81429187888395280

Names of 81429187888395280

• Cardinal: 81429187888395280 can be written as Eighty-one quadrillion, four hundred twenty-nine trillion, one hundred eighty-seven billion, eight hundred eighty-eight million, three hundred ninety-five thousand, two hundred eighty.

Scientific notation

• Scientific notation: 8.142918788839528 × 10¹⁶

Factors of 81429187888395280

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 46812

Divisors of 81429187888395280

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 4 5 8 10 16 20 29 40 58 80 116 127 145 232 254 290 464 508 580 635 1016 1160 1270 2032 2320 2540 3683 5080 7366 10160 14732 16129 18415 29464 32258 36830 46649 58928 64516 73660 80645 93298 129032 147320 161290 186596 233245 258064 294640 322580 373192 466490 467741 645160 746384 932980 935482 1290320 1352821 1865960 1870964 2338705 2705642 3731920 3741928 4677410 5411284 5924423 6764105 7483856 9354820 10822568 11848846 13528210 18709640 21645136 23697692 27056420 29622115 37419280 47395384 54112840 59244230 94790768 108225680 118488460 171808267 236976920 343616534 473953840 687233068 752401721 859041335 1374466136 1504803442 1718082670 2176129201 2748932272 3009606884 3436165340 3762008605 4352258402 6019213768 6872330680 7524017210 8704516804 10880646005 12038427536 13744661360 15048034420 17409033608 21761292010 21819649909 30096068840 34818067216 43522584020 43639299818 60192137680 63107746829 87045168040 87278599636 109098249545 126215493658 174090336080 174557199272 218196499090 252430987316 276368408527 315538734145 349114398544 436392998180 504861974632 552736817054 631077468290 872785996360 1009723949264 1105473634108 1262154936580 1381842042635 1745571992720 2210947268216 2524309873160 2763684085270 4421894536432 5048619746320 5527368170540 8014683847283 11054736341080 16029367694566 22109472682160 32058735389132 35098787882929 40073419236415 64117470778264 70197575765858 80146838472830 128234941556528 140395151531716 160293676945660 175493939414645 280790303063432 320587353891320 350987878829290 561580606126864 641174707782640 701975757658580 1017864848604941 1403951515317160 2035729697209882 2807903030634320 4071459394419764 5089324243024705 8142918788839528 10178648486049410 16285837577679056 20357296972098820 40714593944197640 81429187888395280
• Sum of all divisors σ(n): 197409746718165060
• Sum of proper divisors (its aliquot sum) s(n): 115980558829769780
• 81429187888395280 is an abundant number, because the sum of its proper divisors (115980558829769780) is greater than itself. Its abundance is 34551370941374500

Bases of 81429187888395280

• Binary: 100100001010010110110101000111010011011111011010000010000₂
• Hexadecimal: 0x1214B6A3A6FB410
• Base-36: M9S8KHPF85S

Squares and roots of 81429187888395280

• 81429187888395280 squared (81429187888395280²) is 6630712640163580559320893526278400
• 81429187888395280 cubed (81429187888395280³) is 539933545409837724512169028758855061789086525952000
• The square root of 81429187888395280 is 285357999.5170895503
• The cube root of 81429187888395280 is 433437.7179816521

Scales and comparisons

• 81,429,187,888,395,280 seconds is equal to 2,589,196,297 years, 43 weeks, 2 days, 23 hours, 34 minutes, 40 seconds.
• To count from 1 to 81,429,187,888,395,280 would take you about seven billion, seven hundred sixty-seven million, five hundred eighty-eight thousand, eight hundred ninety-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 81429187888395280 cubic inches would be around 36119.8 feet tall.

Recreational maths with 81429187888395280

• 81429187888395280 backwards is 08259388878192418
• The number of decimal digits it has is: 17
• The sum of 81429187888395280's digits is 91
• More coming soon!