81990325105128

Names of 81990325105128

• Cardinal: 81990325105128 can be written as Eighty-one trillion, nine hundred ninety billion, three hundred twenty-five million, one hundred five thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1990325105128 × 10¹³

Factors of 81990325105128

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 461026

Divisors of 81990325105128

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 18 22 24 29 33 36 44 58 61 66 72 87 88 99 116 122 127 132 174 183 198 232 244 254 261 264 319 348 366 381 396 488 508 522 549 638 671 696 732 762 792 957 1016 1044 1098 1143 1276 1342 1397 1464 1524 1769 1914 2013 2088 2196 2286 2552 2684 2794 2871 3048 3538 3683 3828 4026 4191 4392 4572 5307 5368 5588 5742 6039 7076 7366 7656 7747 8052 8382 9144 10614 11049 11176 11484 12078 12573 14152 14732 15494 15921 16104 16764 19459 21228 22098 22968 23241 24156 25146 29464 30988 31842 33147 33528 38918 40513 42456 44196 46482 48312 50292 58377 61976 63684 66294 69723 77836 81026 85217 88392 92964 100584 116754 121539 127368 132588 139446 155672 162052 170434 175131 185928 224663 233508 243078 255651 265176 278892 324104 340868 350262 364617 449326 460793 467016 486156 511302 557784 673989 681736 700524 729234 766953 898652 921586 972312 1022604 1347978 1382379 1401048 1458468 1533906 1797304 1843172 2021967 2045208 2471293 2695956 2764758 2916936 3067812 3686344 4043934 4147137 4942586 5068723 5391912 5529516 6135624 7413879 8087868 8294274 9885172 10137446 11059032 13362997 14827758 15206169 16175736 16588548 19770344 20274892 22241637 26725994 28108373 29655516 30412338 33177096 40088991 40549784 44483274 45618507 53451988 56216746 58520711 59311032 60824676 80177982 84325119 88966548 91237014 106903976 112433492 117041422 120266973 121649352 146992967 160355964 168650238 175562133 177933096 182474028 224866984 234082844 240533946 252975357 293985934 309192103 320711928 337300476 351124266 364948056 440978901 468165688 481067892 505950714 526686399 587971868 618384206 643727821 674600952 702248532 815142817 881957802 927576309 962135784 1011901428 1053372798 1175943736 1236768412 1287455642 1322936703 1404497064 1630285634 1697100619 1763915604 1855152618 1931183463 2023802856 2106745596 2445428451 2473536824 2574911284 2645873406 2782728927 3260571268 3394201238 3527831208 3569763371 3710305236 3862366926 4213491192 4890856902 5091301857 5149822568 5291746812 5565457854 5793550389 6521142536 6788402476 7139526742 7336285353 7420610472 7724733852 8966570987 9781713804 10182603714 10583493624 10709290113 11130915708 11587100778 13576804952 14279053484 14672570706 15273905571 15449467704 17933141974 18668106809 19563427608 20365207428 21418580226 22261831416 23174201556 26899712961 28558106968 29345141412 30547811142 32127870339 35866283948 37336213618 39267397081 40730414856 42837160452 46348403112 53799425922 56004320427 58690282824 61095622284 64255740678 71732567896 74672427236 78534794162 80699138883 85674320904 103523137759 107598851844 112008640854 117802191243 122191244568 128511481356 149344854472 157069588324 161398277766 168012961281 207046275518 215197703688 224017281708 235604382486 257022962712 310569413277 314139176648 322796555532 336025922562 353406573729 414092551036 448034563416 471208764972 621138826554 645593111064 672051845124 706813147458 828185102072 931708239831 942417529944 1138754515349 1242277653108 1344103690248 1413626294916 1863416479662 2277509030698 2484555306216 2827252589832 3416263546047 3726832959324 4555018061396 6832527092094 7453665918648 9110036122792 10248790638141 13665054184188 20497581276282 27330108368376 40995162552564 81990325105128
• Sum of all divisors σ(n): 256711655116800
• Sum of proper divisors (its aliquot sum) s(n): 174721330011672
• 81990325105128 is an abundant number, because the sum of its proper divisors (174721330011672) is greater than itself. Its abundance is 92731004906544

Bases of 81990325105128

• Binary: 10010101001000111011100001100111111000111101000₂
• Hexadecimal: 0x4A91DC33F1E8
• Base-36: T29U2N1M0

Squares and roots of 81990325105128

• 81990325105128 squared (81990325105128²) is 6722413410844582784251896384
• 81990325105128 cubed (81990325105128³) is 551172861046219744025487165333318163057152
• The square root of 81990325105128 is 9054850.9156765249
• The cube root of 81990325105128 is 43443.1061562697

Scales and comparisons

• 81,990,325,105,128 seconds is equal to 2,607,038 years, 37 weeks, 5 days, 2 hours, 58 minutes, 48 seconds.
• To count from 1 to 81,990,325,105,128 would take you about six million, five hundred seventeen thousand, five hundred ninety-six 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 81990325105128 cubic inches would be around 3620.3 feet tall.

Recreational maths with 81990325105128

• 81990325105128 backwards is 82150152309918
• The number of decimal digits it has is: 14
• The sum of 81990325105128's digits is 54
• More coming soon!