81387983040

Names of 81387983040

• Cardinal: 81387983040 can be written as Eighty-one billion, three hundred eighty-seven million, nine hundred eighty-three thousand and forty.

Scientific notation

• Scientific notation: 8.138798304 × 10¹⁰

Factors of 81387983040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 931669

Divisors of 81387983040

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 32 35 39 40 42 48 52 56 60 64 65 70 78 80 84 91 96 104 105 112 120 130 140 156 160 168 182 192 195 208 210 224 240 260 273 280 312 320 336 364 390 416 420 448 455 480 520 546 560 624 672 728 780 832 840 910 960 1040 1092 1120 1248 1344 1365 1456 1560 1680 1820 2080 2184 2240 2496 2730 2912 3120 3360 3640 4160 4368 5460 5824 6240 6720 7280 8736 10920 12480 14560 17472 21840 29120 43680 87360 931639 1863278 2794917 3726556 4658195 5589834 6521473 7453112 9316390 11179668 12111307 13042946 13974585 14906224 18632780 19564419 22359336 24222614 26085892 27949170 29812448 32607365 36333921 37265560 39128838 44718672 48445228 52171784 55898340 59624896 60556535 65214730 72667842 74531120 78257676 84779149 89437344 96890456 97822095 104343568 111796680 121113070 130429460 145335684 149062240 156515352 169558298 178874688 181669605 193780912 195644190 208687136 223593360 242226140 254337447 260858920 290671368 298124480 313030704 339116596 363339210 387561824 391288380 417374272 423895745 447186720 484452280 508674894 521717840 581342736 626061408 678233192 726678420 775123648 782576760 847791490 894373440 968904560 1017349788 1043435680 1162685472 1252122816 1271687235 1356466384 1453356840 1565153520 1695582980 1937809120 2034699576 2086871360 2325370944 2543374470 2712932768 2906713680 3130307040 3391165960 3875618240 4069399152 5086748940 5425865536 5813427360 6260614080 6782331920 8138798304 10173497880 11626854720 13564663840 16277596608 20346995760 27129327680 40693991520 81387983040
• Sum of all divisors σ(n): 318039536640
• Sum of proper divisors (its aliquot sum) s(n): 236651553600
• 81387983040 is an abundant number, because the sum of its proper divisors (236651553600) is greater than itself. Its abundance is 155263570560

Bases of 81387983040

• Binary: 1001011110011000110100001000011000000₂
• Hexadecimal: 0x12F31A10C0
• Base-36: 11E0AXMO

Squares and roots of 81387983040

• 81387983040 squared (81387983040²) is 6624003783319327641600
• 81387983040 cubed (81387983040³) is 539114307573689272998743998464000
• The square root of 81387983040 is 285285.7918649297
• The cube root of 81387983040 is 4333.6459617185

Scales and comparisons

• 81,387,983,040 seconds is equal to 2,587 years, 46 weeks, 13 hours, 4 minutes.
• To count from 1 to 81,387,983,040 would take you about five thousand, one hundred seventy-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 81387983040 cubic inches would be around 361.1 feet tall.

Recreational maths with 81387983040

• 81387983040 backwards is 04038978318
• The number of decimal digits it has is: 11
• The sum of 81387983040's digits is 51
• More coming soon!