81007121721636

Names of 81007121721636

• Cardinal: 81007121721636 can be written as Eighty-one trillion, seven billion, one hundred twenty-one million, seven hundred twenty-one thousand, six hundred thirty-six.

Scientific notation

• Scientific notation: 8.1007121721636 × 10¹³

Factors of 81007121721636

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 5816

Divisors of 81007121721636

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 9 11 12 18 22 27 29 33 36 44 54 58 66 87 99 108 116 132 174 198 261 297 319 348 396 449 522 594 638 783 898 957 1044 1188 1276 1303 1347 1566 1796 1914 2606 2694 2871 3132 3828 3909 4019 4041 4939 5212 5388 5742 7818 8038 8082 8613 9878 11484 11727 12057 12123 13021 14333 14817 15636 16076 16164 17226 19756 23454 24114 24246 26042 28666 29634 34452 35181 36171 37787 39063 42999 44209 44451 46908 48228 48492 52084 57332 59268 70362 72342 75574 78126 85998 88418 88902 108513 113361 116551 117189 128997 132627 133353 140724 143231 144684 151148 156252 171996 176836 177804 217026 226722 233102 234378 257994 265254 266706 286462 340083 349653 351567 386991 397881 415657 429693 434052 453444 466204 468756 515988 530508 533412 572924 585047 680166 699306 703134 773982 795762 831314 859386 1020249 1048959 1170094 1193643 1246971 1282061 1289079 1360332 1398612 1406268 1547964 1591524 1662628 1718772 1755141 1804531 2040498 2097918 2340188 2387286 2493942 2564122 2578158 3146877 3510282 3609062 3740913 3846183 3867237 4080996 4195836 4774572 4987884 5128244 5156316 5236757 5265423 5413593 6293754 6435517 7020564 7218124 7481826 7692366 7734474 10473514 10530846 10827186 11222739 11538549 12587508 12871034 14963652 15384732 15468948 15710271 15796269 16240779 16966363 19306551 19849841 20947028 21061692 21654372 22445478 23077098 25742068 31420542 31592538 32481558 33932726 34615647 38613102 39699682 44890956 46154196 47130813 48722337 50899089 52331399 57604327 57919653 59549523 62841084 63185076 64963116 67865452 69231294 77226204 79399364 94261626 97444674 101798178 104662798 115208654 115839306 119099046 138462588 141392439 151865953 152697267 156994197 172812981 173758959 178648569 186629993 188523252 194889348 203596356 209325596 230417308 231678612 238198092 282784878 303731906 305394534 313988394 345625962 347517918 357297138 373259986 455597859 458091801 470982591 518438943 535945707 559889979 565569756 575645389 607463812 610789068 627976788 691251924 695035836 714594276 746519972 911195718 916183602 941965182 1036877886 1071891414 1119779958 1151290778 1366793577 1412947773 1555316829 1670525483 1679669937 1726936167 1822391436 1832367204 1883930364 2073755772 2143782828 2239559916 2302581556 2351303893 2733587154 2825895546 3110633658 3341050966 3359339874 3453872334 4100380731 4702607786 5011576449 5039009811 5180808501 5467174308 5651791092 6221267316 6682101932 6718679748 6907744668 7053911679 8200761462 9405215572 10023152898 10078019622 10361617002 14107823358 15034729347 15542425503 16401522924 20046305796 20156039244 20723234004 21161735037 25864342823 28215646716 30069458694 31084851006 42323470074 45104188041 51728685646 60138917388 62169702012 63485205111 68187812897 77593028469 84646940148 90208376082 103457371292 126970410222 136375625794 155186056938 180416752164 204563438691 232779085407 253940820444 272751251588 310372113876 409126877382 465558170814 613690316073 698337256221 750065941867 818253754764 931116341628 1227380632146 1396674512442 1500131883734 1841070948219 2250197825601 2454761264292 2793349024884 3000263767468 3682141896438 4500395651202 6750593476803 7364283792876 9000791302404 13501186953606 20251780430409 27002373907212 40503560860818 81007121721636
• Sum of all divisors σ(n): 237780748800000
• Sum of proper divisors (its aliquot sum) s(n): 156773627078364
• 81007121721636 is an abundant number, because the sum of its proper divisors (156773627078364) is greater than itself. Its abundance is 75766505356728

Bases of 81007121721636

• Binary: 10010011010110011110000101101101110100100100100₂
• Hexadecimal: 0x49ACF0B6E924
• Base-36: SPQ5OQBL0

Squares and roots of 81007121721636

• 81007121721636 squared (81007121721636²) is 6562153769623951060670516496
• 81007121721636 cubed (81007121721636³) is 531581189172019925766164418541996858107456
• The square root of 81007121721636 is 9000395.6425057227
• The cube root of 81007121721636 is 43268.7551337849

Scales and comparisons

• 81,007,121,721,636 seconds is equal to 2,575,775 years, 46 weeks, 5 days, 8 hours, 36 seconds.
• To count from 1 to 81,007,121,721,636 would take you about six million, four hundred thirty-nine thousand, four hundred thirty-nine years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81007121721636 cubic inches would be around 3605.7 feet tall.

Recreational maths with 81007121721636

• 81007121721636 backwards is 63612712170018
• The number of decimal digits it has is: 14
• The sum of 81007121721636's digits is 45
• More coming soon!