81304201620

Names of 81304201620

• Cardinal: 81304201620 can be written as Eighty-one billion, three hundred four million, two hundred one thousand, six hundred twenty.

Scientific notation

• Scientific notation: 8.130420162 × 10¹⁰

Factors of 81304201620

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 464

Divisors of 81304201620

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 53 60 90 106 159 180 212 265 318 401 477 530 636 795 802 954 1060 1203 1590 1604 1908 2005 2385 2406 2809 3180 3609 4010 4770 4812 5618 6015 7218 8020 8427 9540 11236 12030 14045 14436 16854 18045 21253 24060 25281 28090 33708 36090 42135 42506 50562 56180 63759 72180 84270 85012 101124 106265 126405 127518 160801 168540 191277 212530 252810 255036 318795 321602 382554 425060 482403 505620 637590 643204 765108 804005 956385 964806 1126409 1275180 1447209 1608010 1912770 1929612 2252818 2412015 2894418 3216020 3379227 3825540 4505636 4824030 5632045 5788836 6758454 7236045 8522453 9648060 10137681 11264090 13516908 14472090 16896135 17044906 20275362 22528180 25567359 28944180 33792270 34089812 40550724 42612265 50688405 51134718 67584540 76702077 85224530 101376810 102269436 127836795 153404154 170449060 202753620 255673590 306808308 383510385 451690009 511347180 767020770 903380018 1355070027 1534041540 1806760036 2258450045 2710140054 4065210081 4516900090 5420280108 6775350135 8130420162 9033800180 13550700270 16260840324 20326050405 27101400540 40652100810 81304201620
• Sum of all divisors σ(n): 251992207194
• Sum of proper divisors (its aliquot sum) s(n): 170688005574
• 81304201620 is an abundant number, because the sum of its proper divisors (170688005574) is greater than itself. Its abundance is 89383803954

Bases of 81304201620

• Binary: 1001011101110000110111010100110010100₂
• Hexadecimal: 0x12EE1BA994
• Base-36: 11CMF7H0

Squares and roots of 81304201620

• 81304201620 squared (81304201620²) is 6610373201065610624400
• 81304201620 cubed (81304201620³) is 537451115522883205054631691528000
• The square root of 81304201620 is 285138.9163548181
• The cube root of 81304201620 is 4332.1584216023

Scales and comparisons

• 81,304,201,620 seconds is equal to 2,585 years, 11 weeks, 3 days, 20 hours, 27 minutes.
• To count from 1 to 81,304,201,620 would take you about five thousand, one hundred seventy 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 81304201620 cubic inches would be around 361 feet tall.

Recreational maths with 81304201620

• 81304201620 backwards is 02610240318
• The number of decimal digits it has is: 11
• The sum of 81304201620's digits is 27
• More coming soon!