81231328140

Names of 81231328140

• Cardinal: 81231328140 can be written as Eighty-one billion, two hundred thirty-one million, three hundred twenty-eight thousand, one hundred forty.

Scientific notation

• Scientific notation: 8.123132814 × 10¹⁰

Factors of 81231328140

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3246

Divisors of 81231328140

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 10 12 15 17 19 20 30 34 38 51 57 60 68 76 79 85 95 102 114 158 170 190 204 228 237 255 285 289 316 323 340 380 395 474 510 570 578 646 790 867 948 969 1020 1140 1156 1185 1292 1343 1445 1501 1580 1615 1734 1938 2370 2686 2890 3002 3121 3230 3468 3876 4029 4335 4503 4740 4845 5372 5491 5780 6004 6242 6460 6715 7505 8058 8670 9006 9363 9690 10982 12484 13430 15010 15605 16116 16473 17340 18012 18726 19380 20145 21964 22515 22831 25517 26860 27455 30020 31210 32946 37452 40290 45030 45662 46815 51034 53057 54910 59299 62420 65892 68493 76551 80580 82365 90060 91324 93630 102068 106114 109820 114155 118598 127585 136986 153102 159171 164730 177897 187260 212228 228310 237196 246559 255170 265285 273972 296495 306204 318342 329460 342465 355794 382755 433789 456620 493118 510340 530570 592990 636684 684930 711588 739677 765510 795855 867578 889485 901969 986236 1008083 1061140 1185980 1232795 1301367 1369860 1479354 1531020 1591710 1735156 1778970 1803938 2016166 2168945 2465590 2602734 2705907 2958708 3024249 3183420 3557940 3607876 3698385 4032332 4191503 4337890 4509845 4684621 4931180 5040415 5205468 5411814 6048498 6506835 7396770 8383006 8675780 9019690 9369242 10080830 10823628 12096996 12574509 13013670 13529535 14053863 14793540 15121245 16766012 17137411 18039380 18738484 20161660 20957515 23423105 25149018 26027340 27059070 28107726 30242490 34274822 41915030 46846210 50298036 51412233 54118140 56215452 60484980 62872545 68549644 70269315 71255551 79638557 83830060 85687055 93692420 102824466 125745090 140538630 142511102 159277114 171374110 205648932 213766653 238915671 251490180 257061165 281077260 285022204 318554228 342748220 356277755 398192785 427533306 477831342 514122330 712555510 796385570 855066612 955662684 1028244660 1068833265 1194578355 1353855469 1425111020 1592771140 2137666530 2389156710 2707710938 4061566407 4275333060 4778313420 5415421876 6769277345 8123132814 13538554690 16246265628 20307832035 27077109380 40615664070 81231328140
• Sum of all divisors σ(n): 257632435200
• Sum of proper divisors (its aliquot sum) s(n): 176401107060
• 81231328140 is an abundant number, because the sum of its proper divisors (176401107060) is greater than itself. Its abundance is 95169778920

Bases of 81231328140

• Binary: 1001011101001110000111011001110001100₂
• Hexadecimal: 0x12E9C3B38C
• Base-36: 11BF19XO

Squares and roots of 81231328140

• 81231328140 squared (81231328140²) is 6598528671388355859600
• 81231328140 cubed (81231328140³) is 536007247746745764206259369144000
• The square root of 81231328140 is 285011.1017837727
• The cube root of 81231328140 is 4330.8637208695

Scales and comparisons

• 81,231,328,140 seconds is equal to 2,582 years, 47 weeks, 9 hours, 49 minutes.
• To count from 1 to 81,231,328,140 would take you about five thousand, one hundred sixty-five 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 81231328140 cubic inches would be around 360.9 feet tall.

Recreational maths with 81231328140

• 81231328140 backwards is 04182313218
• The number of decimal digits it has is: 11
• The sum of 81231328140's digits is 33
• More coming soon!