81461313792

Names of 81461313792

• Cardinal: 81461313792 can be written as Eighty-one billion, four hundred sixty-one million, three hundred thirteen thousand, seven hundred ninety-two.

Scientific notation

• Scientific notation: 8.1461313792 × 10¹⁰

Factors of 81461313792

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 65

Divisors of 81461313792

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 19 24 27 32 36 38 41 48 54 57 64 72 76 81 82 96 108 114 123 128 144 152 162 164 171 192 216 228 243 246 256 288 304 324 328 342 369 384 432 456 486 492 513 576 608 648 656 684 738 768 779 864 912 972 984 1026 1107 1152 1216 1296 1312 1368 1476 1539 1558 1681 1728 1824 1944 1968 2052 2214 2304 2337 2432 2592 2624 2736 2952 3078 3116 3321 3362 3456 3648 3888 3936 4104 4428 4617 4674 4864 5043 5184 5248 5472 5904 6156 6232 6642 6724 6912 7011 7296 7776 7872 8208 8856 9234 9348 9963 10086 10368 10496 10944 11808 12312 12464 13284 13448 14022 14592 15129 15552 15744 16416 17712 18468 18696 19926 20172 20736 21033 21888 23616 24624 24928 26568 26896 28044 30258 31104 31488 31939 32832 35424 36936 37392 39852 40344 42066 43776 45387 47232 49248 49856 53136 53792 56088 60516 62208 63099 63878 65664 68921 70848 73872 74784 79704 80688 84132 90774 94464 95817 98496 99712 106272 107584 112176 121032 126198 127756 131328 136161 137842 141696 147744 149568 159408 161376 168264 181548 189297 191634 196992 199424 206763 212544 215168 224352 242064 252396 255512 272322 275684 283392 287451 295488 299136 318816 322752 336528 363096 378594 383268 393984 408483 413526 425088 430336 448704 484128 504792 511024 544644 551368 574902 590976 598272 620289 637632 645504 673056 726192 757188 766536 816966 827052 850176 862353 897408 968256 1009584 1022048 1089288 1102736 1149804 1181952 1240578 1275264 1291008 1309499 1346112 1452384 1514376 1533072 1633932 1654104 1724706 1794816 1860867 1936512 2019168 2044096 2178576 2205472 2299608 2481156 2550528 2587059 2618998 2692224 2904768 3028752 3066144 3267864 3308208 3449412 3721734 3873024 3928497 4038336 4088192 4357152 4410944 4599216 4962312 5174118 5237996 5384448 5582601 5809536 6057504 6132288 6535728 6616416 6898824 7443468 7761177 7856994 8076672 8176384 8714304 8821888 9198432 9924624 10348236 10475992 11165202 11619072 11785491 12115008 12264576 13071456 13232832 13797648 14886936 15522354 15713988 16153344 16747803 17428608 17643776 18396864 19849248 20696472 20951984 22330404 23570982 24230016 24529152 26142912 26465664 27595296 29773872 31044708 31427976 33495606 34857216 35356473 36793728 39698496 41392944 41903968 44660808 47141964 48460032 52285824 52931328 55190592 59547744 62089416 62855952 66991212 70712946 73587456 79396992 82785888 83807936 89321616 94283928 104571648 106069419 110381184 119095488 124178832 125711904 133982424 141425892 158793984 165571776 167615872 178643232 188567856 212138838 220762368 238190976 248357664 251423808 267964848 282851784 318208257 331143552 335231744 357286464 377135712 424277676 476381952 496715328 502847616 535929696 565703568 636416514 662287104 714572928 754271424 848555352 993430656 1005695232 1071859392 1131407136 1272833028 1429145856 1508542848 1697110704 1986861312 2143718784 2262814272 2545666056 3017085696 3394221408 4287437568 4525628544 5091332112 6788442816 9051257088 10182664224 13576885632 20365328448 27153771264 40730656896 81461313792
• Sum of all divisors σ(n): 262801331520
• Sum of proper divisors (its aliquot sum) s(n): 181340017728
• 81461313792 is an abundant number, because the sum of its proper divisors (181340017728) is greater than itself. Its abundance is 99878703936

Bases of 81461313792

• Binary: 1001011110111011110010000000100000000₂
• Hexadecimal: 0x12F7790100
• Base-36: 11F7YO00

Squares and roots of 81461313792

• 81461313792 squared (81461313792²) is 6635945644718689419264
• 81461313792 cubed (81461313792³) is 540572850471084906349654953689088
• The square root of 81461313792 is 285414.2844918591
• The cube root of 81461313792 is 4334.9471125359

Scales and comparisons

• 81,461,313,792 seconds is equal to 2,590 years, 11 weeks, 2 days, 6 hours, 43 minutes, 12 seconds.
• To count from 1 to 81,461,313,792 would take you about five thousand, one hundred eighty 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 81461313792 cubic inches would be around 361.2 feet tall.

Recreational maths with 81461313792

• 81461313792 backwards is 29731316418
• The number of decimal digits it has is: 11
• The sum of 81461313792's digits is 45
• More coming soon!