81117942840

Names of 81117942840

• Cardinal: 81117942840 can be written as Eighty-one billion, one hundred seventeen million, nine hundred forty-two thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.111794284 × 10¹⁰

Factors of 81117942840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 10140

Divisors of 81117942840

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 23 24 30 33 36 40 44 45 46 55 60 66 69 72 88 89 90 92 99 110 115 120 132 138 165 178 180 184 198 207 220 230 253 264 267 276 330 345 356 360 396 414 440 445 460 495 506 534 552 660 690 712 759 792 801 828 890 920 979 990 1012 1035 1068 1265 1320 1335 1380 1518 1602 1656 1780 1958 1980 2024 2047 2070 2136 2277 2530 2670 2760 2937 3036 3204 3560 3795 3916 3960 4005 4094 4140 4554 4895 5060 5340 5874 6072 6141 6408 7590 7832 8010 8188 8280 8811 9108 9790 10007 10120 10235 10680 11385 11748 12282 14685 15180 16020 16376 17622 18216 18423 19580 20014 20470 22517 22770 23496 24564 29370 30021 30360 30705 32040 35244 36846 39160 40028 40940 44055 45034 45540 49128 50035 58740 60042 61410 67551 70488 73692 80056 81880 88110 90063 90068 91080 92115 100070 110077 112585 117480 120084 122820 135102 147384 150105 176220 180126 180136 184230 200140 202653 220154 225170 230161 240168 245640 270204 300210 330231 337755 352440 360252 368460 400280 405306 440308 450315 450340 460322 540408 550385 600420 660462 675510 690483 720504 736920 810612 880616 890623 900630 900680 920644 990693 1013265 1100770 1150805 1200840 1320924 1351020 1380966 1621224 1651155 1781246 1801260 1841288 1981386 2026530 2071449 2201540 2301610 2531771 2641848 2671869 2702040 2761932 3302310 3452415 3562492 3602520 3962772 4053060 4142898 4403080 4453115 4603220 4953465 5063542 5343738 5523864 6604620 6904830 7124984 7595313 7925544 8015607 8106120 8285796 8906230 9206440 9796853 9906930 10127084 10357245 10687476 12658855 13209240 13359345 13809660 15190626 16031214 16571592 17812460 19593706 19813860 20254168 20484329 20714490 21374952 22785939 25317710 26718690 27619320 29390559 30381252 32062428 35624920 37976565 39187412 39627720 40078035 40968658 41428980 45571878 48984265 50635420 53437380 58781118 60762504 61452987 64124856 75953130 78374824 80156070 81937316 82857960 88171677 91143756 97968530 101270840 102421645 106874760 113929695 117562236 122905974 146952795 151906260 160312140 163874632 176343354 182287512 184358961 195937060 204843290 225327619 227859390 235124472 245811948 293905590 303812520 307264935 320624280 352686708 368717922 391874120 409686580 440858385 450655238 455718780 491623896 587811180 614529870 675982857 705373416 737435844 819373160 881716770 901310476 911437560 921794805 1126638095 1175622360 1229059740 1351965714 1474871688 1763433540 1802620952 1843589610 2027948571 2253276190 2458119480 2703931428 3379914285 3526867080 3687179220 4055897142 4506552380 5407862856 6759828570 7374358440 8111794284 9013104760 10139742855 13519657140 16223588568 20279485710 27039314280 40558971420 81117942840
• Sum of all divisors σ(n): 303506611200
• Sum of proper divisors (its aliquot sum) s(n): 222388668360
• 81117942840 is an abundant number, because the sum of its proper divisors (222388668360) is greater than itself. Its abundance is 141270725520

Bases of 81117942840

• Binary: 1001011100011000000011001010000111000₂
• Hexadecimal: 0x12E3019438
• Base-36: 119JJ1A0

Squares and roots of 81117942840

• 81117942840 squared (81117942840²) is 6580120650593507265600
• 81117942840 cubed (81117942840³) is 533765850815147734446065498304000
• The square root of 81117942840 is 284812.1184921737
• The cube root of 81117942840 is 4328.8477296331

Scales and comparisons

• 81,117,942,840 seconds is equal to 2,579 years, 15 weeks, 4 days, 1 hour, 54 minutes.
• To count from 1 to 81,117,942,840 would take you about five thousand, one hundred fifty-eight 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 81117942840 cubic inches would be around 360.7 feet tall.

Recreational maths with 81117942840

• 81117942840 backwards is 04824971118
• 81117942840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81117942840's digits is 45
• More coming soon!