81981887678073344

Names of 81981887678073344

• Cardinal: 81981887678073344 can be written as Eighty-one quadrillion, nine hundred eighty-one trillion, eight hundred eighty-seven billion, six hundred seventy-eight million, seventy-three thousand, three hundred forty-four.

Scientific notation

• Scientific notation: 8.1981887678073344 × 10¹⁶

Factors of 81981887678073344

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 485

Divisors of 81981887678073344

• Number of divisors d(n): 300
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 64 97 104 128 194 208 256 373 388 416 512 746 776 832 1261 1492 1552 1664 2522 2984 3104 3328 4849 5044 5968 6208 6656 9409 9698 10088 11936 12416 18818 19396 20176 23872 24832 36181 37636 38792 40352 47744 49664 72362 75272 77584 80704 95488 122317 139129 144724 150544 155168 161408 190976 244634 278258 289448 301088 310336 322816 470353 489268 556516 578896 602176 620672 645632 912673 940706 978536 1113032 1157792 1204352 1241344 1808677 1825346 1881412 1957072 2226064 2315584 2408704 2482688 3509557 3617354 3650692 3762824 3914144 4452128 4631168 4817408 7019114 7234708 7301384 7525648 7828288 8904256 9262336 11864749 13495513 14038228 14469416 14602768 15051296 15656576 17808512 18524672 23729498 26991026 28076456 28938832 29205536 30102592 31313152 35617024 45624241 47458996 53982052 56152912 57877664 58411072 60205184 62626304 71234048 88529281 91248482 94917992 107964104 112305824 115755328 116822144 120410368 175441669 177058562 182496964 189835984 215928208 224611648 231510656 233644288 240820736 340427029 350883338 354117124 364993928 379671968 431856416 449223296 463021312 467288576 680854058 701766676 708234248 729987856 759343936 863712832 898446592 926042624 1150880653 1309064761 1361708116 1403533352 1416468496 1459975712 1518687872 1727425664 1796893184 2301761306 2618129522 2723416232 2807066704 2832936992 2919951424 3037375744 3454851328 4425551377 4603522612 5236259044 5446832464 5614133408 5665873984 5839902848 6074751488 6909702656 8851102754 9207045224 10472518088 10893664928 11228266816 11331747968 11679805696 17017841893 17702205508 18414090448 20945036176 21787329856 22456533632 22663495936 23359611392 33021421813 34035683786 35404411016 36828180896 41890072352 43574659712 44913067264 45326991872 66042843626 68071367572 70808822032 73656361792 83780144704 87149319424 89826134528 126979281817 132085687252 136142735144 141617644064 147312723584 167560289408 174298638848 253958563634 264171374504 272285470288 283235288128 294625447168 335120578816 429278483569 507917127268 528342749008 544570940576 566470576256 589250894336 670241157632 858556967138 1015834254536 1056685498016 1089141881152 1132941152512 1650730663621 1717113934276 2031668509072 2113370996032 2178283762304 2265882305024 3301461327242 3434227868552 4063337018144 4226741992064 4356567524608 6602922654484 6868455737104 8126674036288 8453483984128 8713135049216 12316990336249 13205845308968 13736911474208 16253348072576 16906967968256 24633980672498 26411690617936 27473822948416 32506696145152 49267961344996 52823381235872 54947645896832 65013392290304 98535922689992 105646762471744 109895291793664 160120874371237 197071845379984 211293524943488 219790583587328 320241748742474 394143690759968 422587049886976 640483497484948 788287381519936 845174099773952 1280966994969896 1576574763039872 2561933989939792 3153149526079744 5123867979879584 6306299052159488 10247735959759168 20495471919518336 40990943839036672 81981887678073344
• Sum of all divisors σ(n): 178720616881132326
• Sum of proper divisors (its aliquot sum) s(n): 96738729203058982
• 81981887678073344 is an abundant number, because the sum of its proper divisors (96738729203058982) is greater than itself. Its abundance is 14756841524985638

Bases of 81981887678073344

• Binary: 100100011010000100001011110101101000100010100101000000000₂
• Hexadecimal: 0x1234217AD114A00
• Base-36: MF85J9PWTFK

Squares and roots of 81981887678073344

• 81981887678073344 squared (81981887678073344²) is 6721029907260233990823715843342336
• 81981887678073344 cubed (81981887678073344³) is 551002718937980206969225649569303408668949908291584
• The square root of 81981887678073344 is 286324794.0330584503
• The cube root of 81981887678073344 is 434416.1589664465

Scales and comparisons

• 81,981,887,678,073,344 seconds is equal to 2,606,770,441 years, 27 weeks, 5 days, 10 hours, 35 minutes, 44 seconds.
• To count from 1 to 81,981,887,678,073,344 would take you about seven billion, eight hundred twenty million, three hundred eleven thousand, three hundred twenty-four 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 81981887678073344 cubic inches would be around 36201.3 feet tall.

Recreational maths with 81981887678073344

• 81981887678073344 backwards is 44337087678818918
• The number of decimal digits it has is: 17
• The sum of 81981887678073344's digits is 92
• More coming soon!