81055381320

Names of 81055381320

• Cardinal: 81055381320 can be written as Eighty-one billion, fifty-five million, three hundred eighty-one thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.105538132 × 10¹⁰

Factors of 81055381320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 82

Divisors of 81055381320

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 31 36 40 41 45 54 60 62 72 81 82 90 93 108 120 123 124 135 155 162 164 180 186 205 216 243 246 248 270 279 310 324 328 360 369 372 405 410 465 486 492 540 558 615 620 648 729 738 744 810 820 837 930 972 984 1080 1107 1116 1215 1230 1240 1271 1395 1458 1476 1620 1640 1674 1845 1860 1944 2187 2214 2232 2430 2460 2511 2542 2790 2916 2952 3240 3321 3348 3645 3690 3720 3813 4185 4374 4428 4860 4920 5022 5084 5535 5580 5832 6355 6561 6642 6696 7290 7380 7533 7626 8370 8748 8856 9720 9963 10044 10168 10935 11070 11160 11439 12555 12710 13122 13284 14580 14760 15066 15252 16605 16740 17496 19065 19683 19926 20088 21870 22140 22599 22878 25110 25420 26244 26568 29160 29889 30132 30504 32805 33210 33480 34317 37665 38130 39366 39852 43740 44280 45198 45756 49815 50220 50840 52488 57195 59049 59778 60264 65610 66420 67797 68634 75330 76260 78732 79704 87480 89667 90396 91512 98415 99630 100440 102951 112995 114390 118098 119556 131220 132840 135594 137268 149445 150660 152520 157464 171585 177147 179334 180792 196830 199260 203391 205902 225990 228780 236196 239112 262440 269001 271188 274536 295245 298890 301320 308853 338985 343170 354294 358668 393660 398520 406782 411804 448335 451980 457560 472392 514755 531441 538002 542376 590490 597780 610173 617706 677970 686340 708588 717336 787320 807003 813564 823608 885735 896670 903960 926559 1016955 1029510 1062882 1076004 1180980 1195560 1220346 1235412 1345005 1355940 1372680 1417176 1544265 1594323 1614006 1627128 1771470 1793340 1830519 1853118 2033910 2059020 2125764 2152008 2361960 2421009 2440692 2470824 2657205 2690010 2711880 2779677 3050865 3088530 3188646 3228012 3542940 3586680 3661038 3706236 4035015 4067820 4118040 4251528 4632795 4842018 4881384 5314410 5380020 5491557 5559354 6101730 6177060 6377292 6456024 7085880 7263027 7322076 7412472 7971615 8070030 8135640 8339031 9152595 9265590 9684036 10628820 10760040 10983114 11118708 12105045 12203460 12354120 12754584 13898385 14526054 14644152 15943230 16140060 16474671 16678062 18305190 18531180 19368072 21257640 21789081 21966228 22237416 24210090 24406920 25017093 27457785 27796770 29052108 31886460 32280120 32949342 33356124 36315135 36610380 37062360 41695155 43578162 43932456 48420180 49424013 50034186 54915570 55593540 58104216 63772920 65367243 65898684 66712248 72630270 73220760 75051279 82373355 83390310 87156324 96840360 98848026 100068372 108945405 109831140 111187080 125085465 130734486 131797368 145260540 150102558 164746710 166780620 174312648 197696052 200136744 217890810 219662280 225153837 247120065 250170930 261468972 290521080 300205116 326836215 329493420 333561240 375256395 395392104 435781620 450307674 494240130 500341860 522937944 600410232 653672430 658986840 675461511 750512790 871563240 900615348 988480260 1000683720 1125769185 1307344860 1350923022 1501025580 1801230696 1976960520 2026384533 2251538370 2614689720 2701846044 3002051160 3377307555 4052769066 4503076740 5403692088 6754615110 8105538132 9006153480 10131922665 13509230220 16211076264 20263845330 27018460440 40527690660 81055381320
• Sum of all divisors σ(n): 289273904640
• Sum of proper divisors (its aliquot sum) s(n): 208218523320
• 81055381320 is an abundant number, because the sum of its proper divisors (208218523320) is greater than itself. Its abundance is 127163142000

Bases of 81055381320

• Binary: 1001011011111010001101111011101001000₂
• Hexadecimal: 0x12DF46F748
• Base-36: 118IA4I0

Squares and roots of 81055381320

• 81055381320 squared (81055381320²) is 6569974840930604942400
• 81055381320 cubed (81055381320³) is 532531815994436527264508635968000
• The square root of 81055381320 is 284702.2678518737
• The cube root of 81055381320 is 4327.7345811461

Scales and comparisons

• 81,055,381,320 seconds is equal to 2,577 years, 16 weeks, 23 hours, 42 minutes.
• To count from 1 to 81,055,381,320 would take you about five thousand, one hundred fifty-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 81055381320 cubic inches would be around 360.6 feet tall.

Recreational maths with 81055381320

• 81055381320 backwards is 02318355018
• 81055381320 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81055381320's digits is 36
• More coming soon!