81731995383402

Names of 81731995383402

• Cardinal: 81731995383402 can be written as Eighty-one trillion, seven hundred thirty-one billion, nine hundred ninety-five million, three hundred eighty-three thousand, four hundred two.

Scientific notation

• Scientific notation: 8.1731995383402 × 10¹³

Factors of 81731995383402

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 11948

Divisors of 81731995383402

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 6 7 9 13 14 18 21 26 27 39 42 54 63 78 81 91 117 126 162 169 182 189 234 243 273 338 351 378 486 507 546 567 702 819 1014 1053 1134 1183 1521 1638 1701 2106 2366 2457 3042 3159 3402 3549 4563 4914 6318 7098 7371 9126 10647 11923 13689 14742 21294 22113 23846 27378 31941 35769 41067 44226 63882 71538 82134 83461 95823 107307 154999 166922 191646 214614 250383 287469 309998 321921 464997 500766 574938 643842 751149 929994 965763 1084993 1394991 1502298 1931526 2014987 2169986 2253447 2789982 2897289 3254979 4029974 4184973 4506894 5794578 6044961 6509958 6760341 8369946 9764937 12089922 12554919 13520682 14104909 18134883 19529874 20281023 25109838 28209818 29294811 36269766 37664757 40562046 42314727 54404649 58589622 75329514 84629454 87884433 108809298 126944181 142157929 163213947 175768866 253888362 263653299 284315858 326427894 380832543 426473787 489641841 527306598 761665086 852947574 979283682 995105503 1142497629 1279421361 1848053077 1990211006 2284995258 2558842722 2985316509 3427492887 3696106154 3838264083 5544159231 5970633018 6854985774 7676528166 8955949527 11088318462 11514792249 12936371539 16632477693 17911899054 23029584498 24024690001 25872743078 26867848581 33264955386 34544376747 38809114617 48049380002 49897433079 53735697162 69088753494 72074070003 77618229234 80603545743 99794866158 116427343851 144148140006 149692299237 161207091486 168172830007 216222210009 232854687702 241810637229 299384598474 336345660014 349282031553 432444420018 449076897711 483621274458 504518490021 648666630027 698564063106 898153795422 1009036980042 1047846094659 1297333260054 1513555470063 1945999890081 2095692189318 3027110940126 3143538283977 3891999780162 4540666410189 5837999670243 6287076567954 9081332820378 11675999340486 13621999230567 27243998461134 40865997691701 81731995383402
• Sum of all divisors σ(n): 227285237952864
• Sum of proper divisors (its aliquot sum) s(n): 145553242569462
• 81731995383402 is an abundant number, because the sum of its proper divisors (145553242569462) is greater than itself. Its abundance is 63821247186060

Bases of 81731995383402

• Binary: 10010100101010110110110100011010011011001101010₂
• Hexadecimal: 0x4A55B68D366A
• Base-36: SYZ5RSKMI

Squares and roots of 81731995383402

• 81731995383402 squared (81731995383402²) is 6680119069352445840977093604
• 81731995383402 cubed (81731995383402³) is 545979460936889768140377049878959621960808
• The square root of 81731995383402 is 9040574.9476126793
• The cube root of 81731995383402 is 43397.4322603603

Scales and comparisons

• 81,731,995,383,402 seconds is equal to 2,598,824 years, 33 weeks, 1 day, 18 hours, 56 minutes, 42 seconds.
• To count from 1 to 81,731,995,383,402 would take you about six million, four hundred ninety-seven thousand and sixty-one 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 81731995383402 cubic inches would be around 3616.5 feet tall.

Recreational maths with 81731995383402

• 81731995383402 backwards is 20438359913718
• 81731995383402 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81731995383402's digits is 63
• More coming soon!