81225107130421980

Names of 81225107130421980

• Cardinal: 81225107130421980 can be written as Eighty-one quadrillion, two hundred twenty-five trillion, one hundred seven billion, one hundred thirty million, four hundred twenty-one thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 8.122510713042198 × 10¹⁶

Factors of 81225107130421980

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4558086819910

Divisors of 81225107130421980

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 81 90 99 108 110 132 135 162 165 180 198 220 270 297 324 330 396 405 495 540 594 660 810 891 990 1188 1485 1620 1782 1980 2970 3564 4455 5940 8910 17820 4558086819889 9116173639778 13674260459667 18232347279556 22790434099445 27348520919334 41022781379001 45580868198890 50138955018779 54697041838668 68371302298335 82045562758002 91161736397780 100277910037558 123068344137003 136742604596670 150416865056337 164091125516004 200555820075116 205113906895005 246136688274006 250694775093895 273485209193340 300833730112674 369205032411009 410227813790010 451250595169011 492273376548012 501389550187790 601667460225348 615341720685015 738410064822018 752084325281685 820455627580020 902501190338022 1002779100375580 1230683441370030 1353751785507033 1476820129644036 1504168650563370 1805002380676044 1846025162055045 2256252975845055 2461366882740060 2707503571014066 3008337301126740 3692050324110090 4061255356521099 4512505951690110 5415007142028132 6768758927535165 7384100648220180 8122510713042198 9025011903380220 13537517855070330 16245021426084396 20306276782605495 27075035710140660 40612553565210990 81225107130421980
• Sum of all divisors σ(n): 277970366624171760
• Sum of proper divisors (its aliquot sum) s(n): 196745259493749780
• 81225107130421980 is an abundant number, because the sum of its proper divisors (196745259493749780) is greater than itself. Its abundance is 115520152363327800

Bases of 81225107130421980

• Binary: 100100000100100011100110111111001010110100001001011011100₂
• Hexadecimal: 0x12091CDF95A12DC
• Base-36: M7RWB33C1R0

Squares and roots of 81225107130421980

• 81225107130421980 squared (81225107130421980²) is 6597518028348527578313612867120400
• 81225107130421980 cubed (81225107130421980³) is 535884108647499550183885181536697722966119466392000
• The square root of 81225107130421980 is 285000187.9480467641
• The cube root of 81225107130421980 is 433075.3159943935

Scales and comparisons

• 81,225,107,130,421,980 seconds is equal to 2,582,707,160 years, 51 weeks, 5 days, 2 hours, 33 minutes.
• To count from 1 to 81,225,107,130,421,980 would take you about seven billion, seven hundred forty-eight million, one hundred twenty-one thousand, four hundred eighty-two 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 81225107130421980 cubic inches would be around 36089.6 feet tall.

Recreational maths with 81225107130421980

• 81225107130421980 backwards is 08912403170152218
• 81225107130421980 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81225107130421980's digits is 54
• More coming soon!