81180791328

Names of 81180791328

• Cardinal: 81180791328 can be written as Eighty-one billion, one hundred eighty million, seven hundred ninety-one thousand, three hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1180791328 × 10¹⁰

Factors of 81180791328

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 211

Divisors of 81180791328

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 16 21 24 26 28 29 32 39 42 48 52 56 58 78 84 87 91 96 104 112 116 156 157 168 169 174 182 203 208 224 232 273 312 314 336 338 348 364 377 406 416 464 471 507 546 609 624 628 672 676 696 728 754 812 928 942 1014 1092 1099 1131 1183 1218 1248 1256 1352 1392 1456 1508 1624 1884 2028 2041 2184 2198 2262 2366 2436 2512 2639 2704 2784 2912 3016 3248 3297 3549 3768 4056 4082 4368 4396 4524 4553 4732 4872 4901 5024 5278 5408 6032 6123 6496 6594 7098 7536 7917 8112 8164 8736 8792 9048 9106 9464 9744 9802 10556 12064 12246 13188 13659 14196 14287 14703 15072 15834 16224 16328 17584 18096 18212 18928 19488 19604 21112 24492 24649 26376 26533 27318 28392 28574 29406 31668 31871 32656 34307 35168 36192 36424 37856 39208 42224 42861 48984 49298 52752 53066 54636 56784 57148 58812 59189 63336 63742 65312 68614 72848 73947 78416 79599 84448 85722 95613 97968 98596 102921 105504 106132 109272 113568 114296 117624 118378 126672 127484 137228 145696 147894 156832 159198 171444 172543 177567 185731 191226 195936 197192 205842 212264 218544 228592 235248 236756 253344 254968 274456 295788 318396 320437 342888 345086 355134 371462 382452 394384 411684 414323 424528 437088 457184 470496 473512 509936 517629 548912 557193 591576 636792 640874 685776 690172 710268 714821 742924 764904 769457 788768 823368 828646 849056 947024 961311 1019872 1035258 1097824 1114386 1183152 1242969 1273584 1281748 1371552 1380344 1420536 1429642 1485848 1529808 1538914 1646736 1657292 1894048 1922622 2070516 2144463 2228772 2243059 2308371 2366304 2485938 2547168 2563496 2760688 2841072 2859284 2971696 3059616 3077828 3293472 3314584 3845244 4141032 4165681 4288926 4457544 4486118 4616742 4971876 5003747 5126992 5386199 5521376 5682144 5718568 5943392 6155656 6629168 6729177 7690488 8282064 8331362 8577852 8915088 8972236 9233484 9292673 9943752 10007494 10253984 10772398 11437136 12311312 12497043 13258336 13458354 15011241 15380976 16158597 16564128 16662724 17155704 17830176 17944472 18466968 18585346 19887504 20014988 21544796 22874272 24622624 24994086 26916708 27878019 29159767 30022482 30761952 32317194 33325448 34311408 35888944 36933936 37170692 39775008 40029976 43089592 49988172 53833416 55756038 58319534 60044964 64634388 65048711 66650896 68622816 71777888 73867872 74341384 80059952 86179184 87479301 99976344 107666832 111512076 116639068 120089928 120804749 129268776 130097422 133301792 148682768 160119904 172358368 174958602 195146133 199952688 215333664 223024152 233278136 240179856 241609498 258537552 260194844 297365536 349917204 362414247 390292266 399905376 446048304 466556272 480359712 483218996 517075104 520389688 699834408 724828494 780584532 845633243 892096608 933112544 966437992 1040779376 1399668816 1449656988 1561169064 1691266486 1932875984 2081558752 2536899729 2799337632 2899313976 3122338128 3382532972 3865751968 5073799458 5798627952 6244676256 6765065944 10147598916 11597255904 13530131888 20295197832 27060263776 40590395664 81180791328
• Sum of all divisors σ(n): 274559906880
• Sum of proper divisors (its aliquot sum) s(n): 193379115552
• 81180791328 is an abundant number, because the sum of its proper divisors (193379115552) is greater than itself. Its abundance is 112198324224

Bases of 81180791328

• Binary: 1001011100110110000001001001000100000₂
• Hexadecimal: 0x12E6C09220
• Base-36: 11AKY3HC

Squares and roots of 81180791328

• 81180791328 squared (81180791328²) is 6590320880640280003584
• 81180791328 cubed (81180791328³) is 535007464195819766002443796119552
• The square root of 81180791328 is 284922.4303700919
• The cube root of 81180791328 is 4329.9654079699

Scales and comparisons

• 81,180,791,328 seconds is equal to 2,581 years, 15 weeks, 3 days, 11 hours, 48 minutes, 48 seconds.
• To count from 1 to 81,180,791,328 would take you about five thousand, one hundred sixty-two 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 81180791328 cubic inches would be around 360.8 feet tall.

Recreational maths with 81180791328

• 81180791328 backwards is 82319708118
• 81180791328 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81180791328's digits is 48
• More coming soon!