What is the factorial of 997? (997!) 997 Factorial

What is the factorial of 997?

Here we will show you how to calculate the factorial of 997 (aka 997 factorial) and give you the approximate scientific notation answer and the exact answer.

Before we begin, note that the factorial of 997 can be written as 997 followed by an exclamation mark like this: 997!

Factorial of 997 means that you multiply 997 by every number below it. Therefore, you calculate the factorial of 997 by multiplying 997 by 996, then by 995, and so on all the way down to 1. In other words, we calculate 997 × 996 × 995 × ... × 1 to get 997 factorial.

The answer to 997 factorial (997!) contains 2559 digits and we have listed the exact entire answer at the bottom of this page. However, below is the approximate scientific notation answer to 997 factorial:

4.0359724461 × 10²⁵⁵⁸

The answer above is also sometimes written as 4.0359724461e+2558. Regardless, it means that the approximate answer to 997! is 40359724461 followed by 2548 more digits.

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Like we promised, below is the exact answer to 997 factorial (997!) with all 2559 digits:

403597244616453902342926527652907402110903352461393891430307973735196631901068423726375883385358710213700663198466197719394411318126551961682447808198924968051643330792790545975658652366984953410102994729193397927862707860663312211428139657339199210288839829245965893084586772188847949801354437616450752245066665598898009417557796737695167521343249479413631414534202184726421479392615730781173164526393982880263279118925406206180689438683308644696334133955184235540077242451165903811018277198321800315958279899941381566151490917379981054549852483223292752438981198080270888254399197574536460570473430371595872403169486757166154294941258045311241382930836862005052391967478429035362983199050663230586866257612402804942403442331663944341683350732204123565349869446216232111598995678724462182568501131746383857706790400107507266739002631612931124112227909672935742104968533278074796000335855930432060517447195226436187301231195091058916141500005034486568847599649004940677693185232218378659444854645703908824934015144550035704605317977378620311855095356769488892217130200011250491151641531090120083765159221969755314437880209281708574493693840125338722070514029362985801732618715060934298236579096167095859504053310608725711198457200226544350445941157734863407428532431126485686678788466148681975019174010453297639004006819520704463840773528691224455265229985489764356909675383800245969276679872407757924211918488179598530382266647547907226165479802976547896939656888813256826539067915695278878516257396920983511389029563101112325372395464739783143361362879872578550147571168136083391354242735142803988735616917749898060073075542403509536490539404444972668319521415425667918323473675966566332390993259591959049424070380861864682206986463729281557338747466546627859206287571996491606797979064142819469589200812679026561288124087136359830959867034513441434850212864818601504529520195828528045600869420646442863720485414968365312690523835026508545772659712105161137693595262919371358840019473383802028344531181679417716563013501242477291139042422814166369601152223293596957527530934652046662174154235850073391729650007182794396630407081318880947107940245036774649857429379220776637356890211596540009349092255988047909417594778375705723841918167663026277009033939654785671715045122185315730249393616044737902170116980736000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

What is the factorial of 998?
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