81288971008

Names of 81288971008

• Cardinal: 81288971008 can be written as Eighty-one billion, two hundred eighty-eight million, nine hundred seventy-one thousand and eight.

Scientific notation

• Scientific notation: 8.1288971008 × 10¹⁰

Factors of 81288971008

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 387

Divisors of 81288971008

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 7 8 14 16 28 32 49 56 64 67 98 112 128 134 196 224 256 268 311 392 448 469 536 622 784 896 938 1072 1244 1568 1792 1876 2144 2177 2488 3136 3283 3752 4288 4354 4976 6272 6566 7504 8576 8708 9952 12544 13132 15008 15239 17152 17416 19904 20837 26264 30016 30478 34832 39808 41674 52528 60032 60956 69664 79616 83348 96721 105056 120064 121912 139328 145859 166696 193442 210112 243824 278656 291718 333392 386884 420224 487648 557312 583436 666784 677047 773768 840448 975296 1021013 1166872 1333568 1354094 1547536 1950592 2042026 2333744 2667136 2708188 3095072 3901184 4084052 4667488 4739329 5334272 5416376 6190144 6480307 8168104 9334976 9478658 10832752 12380288 12960614 16336208 18669952 18957316 21665504 24760576 25921228 32672416 37339904 37914632 43331008 45362149 51842456 65344832 75829264 86662016 90724298 103684912 130689664 151658528 173324032 181448596 207369824 261379328 303317056 317535043 362897192 414739648 606634112 635070086 725794384 829479296 1213268224 1270140172 1451588768 1658958592 2540280344 2903177536 5080560688 5806355072 10161121376 11612710144 20322242752 40644485504 81288971008
• Sum of all divisors σ(n): 192187052988
• Sum of proper divisors (its aliquot sum) s(n): 110898081980
• 81288971008 is an abundant number, because the sum of its proper divisors (110898081980) is greater than itself. Its abundance is 29609110972

Bases of 81288971008

• Binary: 1001011101101001100110100001100000000₂
• Hexadecimal: 0x12ED334300
• Base-36: 11CDCRGG

Squares and roots of 81288971008

• 81288971008 squared (81288971008²) is 6607896807539464536064
• 81288971008 cubed (81288971008³) is 537149132011931288487950666432512
• The square root of 81288971008 is 285112.2077498611
• The cube root of 81288971008 is 4331.8878921453

Scales and comparisons

• 81,288,971,008 seconds is equal to 2,584 years, 38 weeks, 2 days, 13 hours, 43 minutes, 28 seconds.
• To count from 1 to 81,288,971,008 would take you about five thousand, one hundred sixty-nine 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 81288971008 cubic inches would be around 361 feet tall.

Recreational maths with 81288971008

• 81288971008 backwards is 80017988218
• The number of decimal digits it has is: 11
• The sum of 81288971008's digits is 52
• More coming soon!