81121316040

Names of 81121316040

• Cardinal: 81121316040 can be written as Eighty-one billion, one hundred twenty-one million, three hundred sixteen thousand and forty.

Scientific notation

• Scientific notation: 8.112131604 × 10¹⁰

Factors of 81121316040

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 303

Divisors of 81121316040

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 29 30 34 36 40 45 51 58 59 60 61 68 72 85 87 90 102 116 118 120 122 127 136 145 153 170 174 177 180 183 204 232 236 244 254 255 261 290 295 305 306 340 348 354 360 366 381 408 435 472 488 493 508 510 522 531 549 580 590 610 612 635 680 696 708 732 762 765 870 885 915 986 1003 1016 1020 1037 1044 1062 1098 1143 1160 1180 1220 1224 1270 1305 1416 1464 1479 1524 1530 1711 1740 1769 1770 1830 1905 1972 2006 2040 2074 2088 2124 2159 2196 2286 2360 2440 2465 2540 2610 2655 2745 2958 3009 3048 3060 3111 3422 3480 3538 3540 3599 3660 3683 3810 3944 4012 4148 4248 4318 4392 4437 4572 4930 5015 5080 5133 5185 5220 5307 5310 5490 5715 5916 6018 6120 6222 6477 6844 7076 7080 7198 7320 7366 7395 7493 7620 7747 8024 8296 8555 8636 8845 8874 9027 9144 9333 9860 10030 10266 10370 10440 10614 10620 10795 10797 10980 11049 11430 11832 12036 12444 12954 13688 14152 14396 14732 14790 14986 15045 15240 15399 15494 15555 15921 17110 17272 17690 17748 17995 18054 18415 18666 19431 19720 20060 20532 20740 21228 21240 21590 21594 21960 22098 22185 22479 22860 23241 24072 24888 25665 25908 26535 28792 29087 29464 29580 29972 30073 30090 30798 30988 31110 31842 32385 32391 33147 34220 35380 35496 35990 36108 36830 37332 37465 38735 38862 40120 41064 41480 42456 43180 43188 44196 44370 44958 45135 45720 46482 46665 51330 51816 53070 53985 55245 58174 59160 59944 60146 60180 61183 61596 61976 62220 62611 63684 64770 64782 66294 67437 68440 69723 70760 71980 72216 73660 74664 74930 76995 77470 77724 79605 86360 86376 87261 88392 88740 89916 90219 90270 92964 93330 97155 102660 104371 106140 107970 110490 112395 116205 116348 120292 120360 122366 123192 124440 125222 127368 127381 129540 129564 131699 132588 134874 139446 143960 145435 147320 149860 150365 153990 154940 155448 159210 161955 165735 174522 177480 179832 180438 180540 183549 185928 186660 187833 194310 205320 208742 212280 215940 217297 220980 224663 224790 232410 232696 240584 244732 250444 254762 259080 259128 261783 263398 265176 269748 270657 278892 290870 299720 300730 305915 307980 309880 313055 313113 318420 323910 331470 337185 348615 349044 360876 361080 367098 373320 375666 382143 388620 395097 417484 431880 434594 436305 441960 449326 449580 451095 457073 464820 489464 500888 509524 521855 523566 526796 539496 541314 550647 557784 563499 581740 601460 611830 615960 626110 626226 636840 636905 647820 651891 658495 662940 673989 674370 697230 698088 721752 734196 751332 764286 777240 790194 834968 869188 872610 898652 899160 902190 914146 917745 929640 939165 939339 1019048 1043710 1047132 1053592 1082628 1086485 1101294 1123315 1126998 1146429 1163480 1185291 1202920 1223660 1252220 1252452 1273810 1295640 1303782 1308915 1316990 1325880 1347978 1348740 1353285 1371219 1394460 1468392 1502664 1528572 1565565 1580388 1738376 1745220 1774307 1797304 1804380 1828292 1835490 1878330 1878678 1910715 1955673 1975485 2021967 2087420 2094264 2165256 2172970 2202588 2246630 2253996 2285365 2292858 2370582 2447320 2504440 2504904 2547620 2607564 2617830 2633980 2695956 2697480 2706570 2742438 2753235 2788920 2817495 3057144 3131130 3160776 3259455 3369945 3490440 3548614 3608760 3656584 3670980 3694049 3756660 3757356 3819271 3821430 3911346 3950970 4043934 4113657 4174840 4345940 4405176 4493260 4507992 4570730 4585716 4696695 4741164 5095240 5215128 5235660 5267960 5322921 5391912 5413140 5484876 5506470 5634990 5732145 5926455 6262260 6518910 6739890 6856095 7097228 7341960 7388098 7513320 7514712 7638542 7642860 7770241 7822692 7901940 8087868 8227314 8691880 8871535 8986520 9141460 9171432 9393390 9482328 9778365 10109835 10471320 10645842 10826280 10969752 11012940 11082147 11269980 11457813 11464290 11852910 12524520 13037820 13255117 13479780 13712190 14194456 14776196 15277084 15285720 15540482 15645384 15803880 15968763 16175736 16454628 17743070 18282920 18470245 18786780 19096355 19556730 20219670 20568285 21291684 22025880 22164294 22539960 22915626 22928580 23310723 23705820 26075640 26510234 26614605 26959560 27424380 29552392 30554168 31080964 31937526 32909256 33246441 34373439 35486140 36940490 37573560 38192710 38851205 39113460 39765351 40439340 41136570 42583368 44328588 45831252 45857160 46621446 47411640 53020468 53229210 54848760 55410735 57289065 62161928 63875052 66275585 66492882 68746878 69932169 70972280 73880980 76385420 77702410 78226920 79530702 79843815 80878680 82273140 88657176 91662504 93242892 106040936 106458420 110821470 114578130 116553615 119296053 127750104 132551170 132985764 137493756 139864338 147761960 152770840 155404820 159061404 159687630 164546280 166232205 171867195 186485784 198826755 212916840 221642940 225336989 229156260 233107230 238592106 265102340 265971528 274987512 279728676 310809640 318122808 319375260 332464410 343734390 349660845 397653510 443285880 450673978 458312520 466214460 477184212 530204680 559457352 596480265 638750520 664928820 676010967 687468780 699321690 795307020 901347956 932428920 954368424 1126684945 1192960530 1329857640 1352021934 1374937560 1398643380 1590614040 1802695912 2028032901 2253369890 2385921060 2704043868 2797286760 3380054835 4056065802 4506739780 4771842120 5408087736 6760109670 8112131604 9013479560 10140164505 13520219340 16224263208 20280329010 27040438680 40560658020 81121316040
• Sum of all divisors σ(n): 300837888000
• Sum of proper divisors (its aliquot sum) s(n): 219716571960
• 81121316040 is an abundant number, because the sum of its proper divisors (219716571960) is greater than itself. Its abundance is 138595255920

Bases of 81121316040

• Binary: 1001011100011001101010000110011001000₂
• Hexadecimal: 0x12E3350CC8
• Base-36: 119LJC20

Squares and roots of 81121316040

• 81121316040 squared (81121316040²) is 6580667916061561281600
• 81121316040 cubed (81121316040³) is 533832441773118104820501036864000
• The square root of 81121316040 is 284818.0402291961
• The cube root of 81121316040 is 4328.9077322509

Scales and comparisons

• 81,121,316,040 seconds is equal to 2,579 years, 21 weeks, 1 day, 2 hours, 54 minutes.
• To count from 1 to 81,121,316,040 would take you about five thousand, one hundred fifty-eight 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 81121316040 cubic inches would be around 360.7 feet tall.

Recreational maths with 81121316040

• 81121316040 backwards is 04061312118
• The number of decimal digits it has is: 11
• The sum of 81121316040's digits is 27
• More coming soon!