81078921040

Names of 81078921040

• Cardinal: 81078921040 can be written as Eighty-one billion, seventy-eight million, nine hundred twenty-one thousand and forty.

Scientific notation

• Scientific notation: 8.107892104 × 10¹⁰

Factors of 81078921040

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 592

Divisors of 81078921040

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 23 26 40 46 52 61 65 80 92 104 115 122 130 181 184 208 230 244 260 299 305 307 362 368 460 488 520 598 610 614 724 793 905 920 976 1040 1196 1220 1228 1403 1448 1495 1535 1586 1810 1840 2353 2392 2440 2456 2806 2896 2990 3070 3172 3620 3965 3991 4163 4706 4784 4880 4912 5612 5980 6140 6344 7015 7061 7240 7930 7982 8326 9412 11041 11224 11765 11960 12280 12688 14030 14122 14480 15860 15964 16652 18239 18727 18824 19955 20815 22082 22448 23530 23920 24560 28060 28244 31720 31928 33304 35305 36478 37454 37648 39910 41630 44164 47060 54119 55205 55567 56120 56488 63440 63856 66608 70610 72956 74908 79820 83260 88328 91195 91793 93635 94120 108238 110410 111134 112240 112976 141220 143533 145912 149816 159640 166520 176656 182390 183586 187270 188240 216476 220820 222268 243451 253943 270595 277835 282440 287066 291824 299632 319280 333040 364780 367172 374540 430721 432952 441640 444536 458965 486902 507886 541190 555670 564880 574132 717665 722371 729560 734344 749080 861442 865904 883280 889072 917930 973804 1015772 1082380 1111340 1148264 1217255 1269715 1278041 1435330 1444742 1459120 1468688 1498160 1722884 1835860 1947608 2031544 2153605 2164760 2222680 2296528 2434510 2539430 2556082 2870660 2889484 3301259 3389587 3445768 3611855 3671720 3895216 4063088 4307210 4329520 4445360 4869020 5078860 5112164 5599373 5741320 5778968 6390205 6602518 6779174 6891536 7223710 7343440 8614420 9738040 10157720 10224328 11198746 11482640 11557936 12780410 13205036 13558348 14447420 16506295 16614533 16947935 17228840 19476080 20315440 20448656 22397492 25560820 26410072 27116696 27996865 28894840 33012590 33229066 33895870 34457680 44064631 44794984 51121640 52820144 54233392 55993730 57789680 66025180 66458132 67791740 77960501 83072665 88129262 89589968 102243280 111987460 132050360 132916264 135583480 155921002 166145330 176258524 220323155 223974920 264100720 265832528 271166960 311842004 332290660 352517048 389802505 440646310 447949840 623684008 664581320 705034096 779605010 881292620 1013486513 1247368016 1329162640 1559210020 1762585240 2026973026 3118420040 3525170480 4053946052 5067432565 6236840080 8107892104 10134865130 16215784208 20269730260 40539460520 81078921040
• Sum of all divisors σ(n): 217203098112
• Sum of proper divisors (its aliquot sum) s(n): 136124177072
• 81078921040 is an abundant number, because the sum of its proper divisors (136124177072) is greater than itself. Its abundance is 55045256032

Bases of 81078921040

• Binary: 1001011100000101011100010011101010000₂
• Hexadecimal: 0x12E0AE2750
• Base-36: 118WANV4

Squares and roots of 81078921040

• 81078921040 squared (81078921040²) is 6573791437010554681600
• 81078921040 cubed (81078921040³) is 532995916854806896676048740864000
• The square root of 81078921040 is 284743.6057930011
• The cube root of 81078921040 is 4328.1534873241

Scales and comparisons

• 81,078,921,040 seconds is equal to 2,578 years, 3 weeks, 10 hours, 30 minutes, 40 seconds.
• To count from 1 to 81,078,921,040 would take you about five thousand, one hundred fifty-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 81078921040 cubic inches would be around 360.7 feet tall.

Recreational maths with 81078921040

• 81078921040 backwards is 04012987018
• 81078921040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81078921040's digits is 40
• More coming soon!