81138360960

Names of 81138360960

• Cardinal: 81138360960 can be written as Eighty-one billion, one hundred thirty-eight million, three hundred sixty thousand, nine hundred sixty.

Scientific notation

• Scientific notation: 8.113836096 × 10¹⁰

Factors of 81138360960

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 521733

Divisors of 81138360960

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 64 72 80 81 90 96 108 120 128 135 144 160 162 180 192 216 240 243 270 288 320 324 360 384 405 432 480 486 540 576 640 648 720 810 864 960 972 1080 1152 1215 1296 1440 1620 1728 1920 1944 2160 2430 2592 2880 3240 3456 3888 4320 4860 5184 5760 6480 7776 8640 9720 10368 12960 15552 17280 19440 25920 31104 38880 51840 77760 155520 521723 1043446 1565169 2086892 2608615 3130338 4173784 4695507 5217230 6260676 7825845 8347568 9391014 10434460 12521352 14086521 15651690 16695136 18782028 20868920 23477535 25042704 28173042 31303380 33390272 37564056 41737840 42259563 46955070 50085408 56346084 62606760 66780544 70432605 75128112 83475680 84519126 93910140 100170816 112692168 125213520 126778689 140865210 150256224 166951360 169038252 187820280 200341632 211297815 225384336 250427040 253557378 281730420 300512448 333902720 338076504 375640560 422595630 450768672 500854080 507114756 563460840 601024896 633893445 676153008 751281120 845191260 901537344 1001708160 1014229512 1126921680 1267786890 1352306016 1502562240 1690382520 1803074688 2028459024 2253843360 2535573780 2704612032 3005124480 3380765040 4056918048 4507686720 5071147560 5409224064 6761530080 8113836096 9015373440 10142295120 13523060160 16227672192 20284590240 27046120320 40569180480 81138360960
• Sum of all divisors σ(n): 290558530080
• Sum of proper divisors (its aliquot sum) s(n): 209420169120
• 81138360960 is an abundant number, because the sum of its proper divisors (209420169120) is greater than itself. Its abundance is 128281808160

Bases of 81138360960

• Binary: 1001011100100001110010010001010000000₂
• Hexadecimal: 0x12E4392280
• Base-36: 119VOO00

Squares and roots of 81138360960

• 81138360960 squared (81138360960²) is 6583433619275252121600
• 81138360960 cubed (81138360960³) is 534169013356954620237386612736000
• The square root of 81138360960 is 284847.9611301439
• The cube root of 81138360960 is 4329.2109025409

Scales and comparisons

• 81,138,360,960 seconds is equal to 2,579 years, 49 weeks, 2 days, 9 hours, 36 minutes.
• To count from 1 to 81,138,360,960 would take you about five thousand, one hundred fifty-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 81138360960 cubic inches would be around 360.8 feet tall.

Recreational maths with 81138360960

• 81138360960 backwards is 06906383118
• 81138360960 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81138360960's digits is 45
• More coming soon!