81831321040

Names of 81831321040

• Cardinal: 81831321040 can be written as Eighty-one billion, eight hundred thirty-one million, three hundred twenty-one thousand and forty.

Scientific notation

• Scientific notation: 8.183132104 × 10¹⁰

Factors of 81831321040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 638

Divisors of 81831321040

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 17 20 28 34 35 40 49 56 68 70 80 85 98 112 119 136 140 170 196 238 245 272 280 289 340 343 392 476 490 560 578 595 607 680 686 784 833 952 980 1156 1190 1214 1360 1372 1445 1666 1715 1904 1960 2023 2312 2380 2428 2744 2890 3035 3332 3430 3920 4046 4165 4249 4624 4760 4856 4913 5488 5780 5831 6070 6664 6860 8092 8330 8498 9520 9712 9826 10115 10319 11560 11662 12140 13328 13720 14161 16184 16660 16996 19652 20230 20638 21245 23120 23324 24280 24565 27440 28322 29155 29743 32368 33320 33992 34391 39304 40460 41276 42490 46648 48560 49130 51595 56644 58310 59486 66640 67984 68782 70805 72233 78608 80920 82552 84980 93296 98260 99127 103190 113288 116620 118972 137564 141610 144466 148715 161840 165104 169960 171955 175423 196520 198254 206380 208201 226576 233240 237944 240737 275128 283220 288932 297430 339920 343910 350846 361165 393040 396508 412760 416402 466480 475888 481474 495635 505631 550256 566440 577864 594860 687820 701692 722330 793016 825520 832804 877115 962948 991270 1011262 1041005 1132880 1155728 1189720 1203685 1227961 1375640 1403384 1444660 1586032 1665608 1685159 1754230 1925896 1982540 2022524 2082010 2379440 2407370 2455922 2528155 2751280 2806768 2889320 2982191 3331216 3370318 3508460 3539417 3851792 3965080 4045048 4164020 4814740 4911844 5056310 5778640 5964382 6139805 6740636 7016920 7078834 7930160 8090096 8328040 8425795 8595727 9629480 9823688 10112620 11928764 12279610 13481272 14033840 14157668 14910955 16656080 16851590 17191454 17697085 19258960 19647376 20225240 20875337 23857528 24559220 26962544 28315336 29821910 33703180 34382908 35394170 40450480 41750674 42978635 47715056 49118440 56630672 59643820 60170089 67406360 68765816 70788340 83501348 85957270 98236880 104376685 119287640 120340178 134812720 137531632 141576680 146127359 167002696 171914540 208753370 238575280 240680356 283153360 292254718 300850445 334005392 343829080 417506740 481360712 584509436 601700890 687658160 730636795 835013480 962721424 1022891513 1169018872 1203401780 1461273590 1670026960 2045783026 2338037744 2406803560 2922547180 4091566052 4813607120 5114457565 5845094360 8183132104 10228915130 11690188720 16366264208 20457830260 40915660520 81831321040
• Sum of all divisors σ(n): 236127744000
• Sum of proper divisors (its aliquot sum) s(n): 154296422960
• 81831321040 is an abundant number, because the sum of its proper divisors (154296422960) is greater than itself. Its abundance is 72465101920

Bases of 81831321040

• Binary: 1001100001101100001101101110111010000₂
• Hexadecimal: 0x130D86DDD0
• Base-36: 11LC97F4

Squares and roots of 81831321040

• 81831321040 squared (81831321040²) is 6696365103151546681600
• 81831321040 cubed (81831321040³) is 547972402557046932274556260864000
• The square root of 81831321040 is 286061.7434051607
• The cube root of 81831321040 is 4341.5004870669

Scales and comparisons

• 81,831,321,040 seconds is equal to 2,601 years, 51 weeks, 18 hours, 30 minutes, 40 seconds.
• To count from 1 to 81,831,321,040 would take you about five thousand, two hundred three 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 81831321040 cubic inches would be around 361.8 feet tall.

Recreational maths with 81831321040

• 81831321040 backwards is 04012313818
• The number of decimal digits it has is: 11
• The sum of 81831321040's digits is 31
• More coming soon!