81690828840

Names of 81690828840

• Cardinal: 81690828840 can be written as Eighty-one billion, six hundred ninety million, eight hundred twenty-eight thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.169082884 × 10¹⁰

Factors of 81690828840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 9861

Divisors of 81690828840

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 41 45 60 72 82 90 120 123 164 180 205 246 328 360 369 410 492 601 615 738 820 984 1202 1230 1476 1640 1803 1845 2404 2460 2952 3005 3606 3690 4808 4920 5409 6010 7212 7380 9015 9209 10818 12020 14424 14760 18030 18418 21636 24040 24641 27045 27627 36060 36836 43272 46045 49282 54090 55254 72120 73672 73923 82881 92090 98564 108180 110508 123205 138135 147846 165762 184180 197128 216360 221016 221769 246410 276270 295692 331524 368360 369615 377569 414405 443538 492820 552540 591384 663048 739230 755138 828810 887076 985640 1105080 1108845 1132707 1478460 1510276 1657620 1774152 1887845 2217690 2265414 2956920 3020552 3315240 3398121 3775690 4435380 4530828 5534609 5663535 6796242 7551380 8870760 9061656 11069218 11327070 13592484 15102760 16603827 16990605 22138436 22654140 27184968 27673045 33207654 33981210 44276872 45308280 49811481 55346090 66415308 67962420 83019135 99622962 110692180 132830616 135924840 166038270 199245924 221384360 226918969 249057405 332076540 398491848 453837938 498114810 664153080 680756907 907675876 996229620 1134594845 1361513814 1815351752 1992459240 2042270721 2269189690 2723027628 3403784535 4084541442 4538379380 5446055256 6807569070 8169082884 9076758760 10211353605 13615138140 16338165768 20422707210 27230276280 40845414420 81690828840
• Sum of all divisors σ(n): 272452798800
• Sum of proper divisors (its aliquot sum) s(n): 190761969960
• 81690828840 is an abundant number, because the sum of its proper divisors (190761969960) is greater than itself. Its abundance is 109071141120

Bases of 81690828840

• Binary: 1001100000101001001110010000000101000₂
• Hexadecimal: 0x1305272028
• Base-36: 11J0LYY0

Squares and roots of 81690828840

• 81690828840 squared (81690828840²) is 6673391516566175745600
• 81690828840 cubed (81690828840³) is 545154884162115487367168983104000
• The square root of 81690828840 is 285816.0751952207
• The cube root of 81690828840 is 4339.0144937537

Scales and comparisons

• 81,690,828,840 seconds is equal to 2,597 years, 26 weeks, 5 days, 16 hours, 54 minutes.
• To count from 1 to 81,690,828,840 would take you about five thousand, one hundred ninety-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 81690828840 cubic inches would be around 361.6 feet tall.

Recreational maths with 81690828840

• 81690828840 backwards is 04882809618
• The number of decimal digits it has is: 11
• The sum of 81690828840's digits is 54
• More coming soon!