81943698720

Names of 81943698720

• Cardinal: 81943698720 can be written as Eighty-one billion, nine hundred forty-three million, six hundred ninety-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.194369872 × 10¹⁰

Factors of 81943698720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 198

Divisors of 81943698720

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 31 32 37 39 40 48 52 60 62 65 74 78 80 93 96 104 107 111 120 124 130 148 155 156 160 185 186 195 208 214 222 240 248 260 296 310 312 321 370 372 390 403 416 428 444 465 480 481 496 520 535 555 592 620 624 642 740 744 780 806 856 888 930 962 992 1040 1070 1110 1147 1184 1209 1240 1248 1284 1391 1443 1480 1488 1560 1605 1612 1712 1776 1860 1924 2015 2080 2140 2220 2294 2405 2418 2480 2568 2782 2886 2960 2976 3120 3210 3224 3317 3424 3441 3552 3720 3848 3959 4030 4173 4280 4440 4588 4810 4836 4960 5136 5564 5735 5772 5920 6045 6240 6420 6448 6634 6882 6955 7215 7440 7696 7918 8060 8346 8560 8880 9176 9620 9672 9951 10272 11128 11449 11470 11544 11877 12090 12840 12896 13268 13764 13910 14430 14880 14911 15392 15836 16120 16585 16692 17120 17205 17760 18352 19240 19344 19795 19902 20865 22256 22898 22940 23088 23754 24180 25680 26536 27528 27820 28860 29822 31672 32240 33170 33384 34347 34410 36704 38480 38688 39590 39804 41730 43121 44512 44733 45796 45880 46176 47508 48360 49755 51360 51467 53072 55056 55640 57245 57720 59385 59644 63344 64480 66340 66768 68694 68820 74555 76960 79180 79608 83460 86242 89466 91592 91760 95016 96720 99510 102934 106144 110112 111280 114490 115440 118770 119288 122729 126688 129363 132680 133536 137388 137640 148837 149110 154401 158360 159216 166920 171735 172484 178932 183184 183520 190032 193440 199020 205868 215605 222560 223665 228980 230880 237540 238576 245458 257335 258726 265360 274776 275280 297674 298220 308802 316720 318432 333840 343470 344968 354919 357864 366368 368187 380064 398040 411736 423613 431210 446511 447330 457960 475080 477152 490916 514670 517452 530720 549552 550560 595348 596440 613645 617604 633440 646815 667680 686940 689936 709838 715728 736374 744185 772005 796080 823472 847226 862420 893022 894660 915920 950160 981832 1029340 1034904 1064757 1099104 1190696 1192880 1227290 1235208 1270839 1293630 1373880 1379872 1419676 1431456 1472748 1488370 1544010 1592160 1595477 1646944 1694452 1724840 1774595 1786044 1789320 1831840 1840935 1900320 1963664 2058680 2069808 2118065 2129514 2232555 2381392 2385760 2454580 2470416 2541678 2587260 2747760 2839352 2945496 2976740 3088020 3190954 3388904 3449680 3549190 3572088 3578640 3681870 3927328 4117360 4139616 4236130 4259028 4465110 4613947 4762784 4786431 4909160 4940832 5083356 5174520 5323785 5495520 5506969 5678704 5890992 5953480 6176040 6354195 6381908 6777808 6899360 7098380 7144176 7157280 7363740 7977385 8234720 8472260 8518056 8930220 9227894 9572862 9818320 10166712 10349040 10647570 11013938 11357408 11781984 11906960 12352080 12708390 12763816 13132003 13555616 13841841 14196760 14288352 14727480 15954770 16520907 16944520 17036112 17860440 18455788 19145724 19636640 20333424 20698080 21295140 22027876 23069735 23813920 23932155 24704160 25416780 25527632 26264006 27534845 27683682 28393520 29454960 31909540 33041814 33889040 34072224 35720880 36911576 38291448 39396009 40666848 42590280 44055752 46139470 47864310 50833560 51055264 52528012 55069690 55367364 56787040 58909920 63819080 65660015 66083628 67778080 69209205 71441760 73823152 76582896 78792018 82604535 85180560 88111504 92278940 95728620 101667120 105056024 110139380 110734728 127638160 131320030 132167256 138418410 147646304 153165792 157584036 165209070 170361120 170716039 176223008 184557880 191457240 196980045 203334240 210112048 220278760 221469456 255276320 262640060 264334512 276836820 315168072 330418140 341432078 369115760 382914480 393960090 420224096 440557520 442938912 512148117 525280120 528669024 553673640 630336144 660836280 682864156 738231520 765828960 787920180 853580195 881115040 1024296234 1050560240 1107347280 1260672288 1321672560 1365728312 1575840360 1707160390 2048592468 2101120480 2214694560 2560740585 2643345120 2731456624 3151680720 3414320780 4097184936 5121481170 5462913248 6303361440 6828641560 8194369872 10242962340 13657283120 16388739744 20485924680 27314566240 40971849360 81943698720
• Sum of all divisors σ(n): 297480508416
• Sum of proper divisors (its aliquot sum) s(n): 215536809696
• 81943698720 is an abundant number, because the sum of its proper divisors (215536809696) is greater than itself. Its abundance is 133593110976

Bases of 81943698720

• Binary: 1001100010100001110011001110100100000₂
• Hexadecimal: 0x1314399D20
• Base-36: 11N75ULC

Squares and roots of 81943698720

• 81943698720 squared (81943698720²) is 6714769759914129638400
• 81943698720 cubed (81943698720³) is 550233070180570172160072142848000
• The square root of 81943698720 is 286258.0980863249
• The cube root of 81943698720 is 4343.4869497085

Scales and comparisons

• 81,943,698,720 seconds is equal to 2,605 years, 28 weeks, 6 days, 10 hours, 32 minutes.
• To count from 1 to 81,943,698,720 would take you about five thousand, two hundred eleven 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 81943698720 cubic inches would be around 362 feet tall.

Recreational maths with 81943698720

• 81943698720 backwards is 02789634918
• The number of decimal digits it has is: 11
• The sum of 81943698720's digits is 57
• More coming soon!