81143640000

Names of 81143640000

• Cardinal: 81143640000 can be written as Eighty-one billion, one hundred forty-three million, six hundred forty thousand.

Scientific notation

• Scientific notation: 8.114364 × 10¹⁰

Factors of 81143640000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 75143

Divisors of 81143640000

• Number of divisors d(n): 280
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 32 36 40 45 48 50 54 60 64 72 75 80 90 96 100 108 120 125 135 144 150 160 180 192 200 216 225 240 250 270 288 300 320 360 375 400 432 450 480 500 540 576 600 625 675 720 750 800 864 900 960 1000 1080 1125 1200 1250 1350 1440 1500 1600 1728 1800 1875 2000 2160 2250 2400 2500 2700 2880 3000 3375 3600 3750 4000 4320 4500 4800 5000 5400 5625 6000 6750 7200 7500 8000 8640 9000 10000 10800 11250 12000 13500 14400 15000 16875 18000 20000 21600 22500 24000 27000 30000 33750 36000 40000 43200 45000 54000 60000 67500 72000 75133 90000 108000 120000 135000 150266 180000 216000 225399 270000 300532 360000 375665 450798 540000 601064 676197 751330 901596 1080000 1126995 1202128 1352394 1502660 1803192 1878325 2028591 2253990 2404256 2704788 3005320 3380985 3606384 3756650 4057182 4507980 4808512 5409576 5634975 6010640 6761970 7212768 7513300 8114364 9015960 9391625 10142955 10819152 11269950 12021280 13523940 14425536 15026600 16228728 16904925 18031920 18783250 20285910 21638304 22539900 24042560 27047880 28174875 30053200 32457456 33809850 36063840 37566500 40571820 43276608 45079800 46958125 50714775 54095760 56349750 60106400 64914912 67619700 72127680 75133000 81143640 84524625 90159600 93916250 101429550 108191520 112699500 120212800 129829824 135239400 140874375 150266000 162287280 169049250 180319200 187832500 202859100 216383040 225399000 253573875 270478800 281748750 300532000 324574560 338098500 360638400 375665000 405718200 422623125 450798000 507147750 540957600 563497500 601064000 649149120 676197000 751330000 811436400 845246250 901596000 1014295500 1081915200 1126995000 1267869375 1352394000 1502660000 1622872800 1690492500 1803192000 2028591000 2253990000 2535738750 2704788000 3005320000 3245745600 3380985000 4057182000 4507980000 5071477500 5409576000 6761970000 8114364000 9015960000 10142955000 13523940000 16228728000 20285910000 27047880000 40571820000 81143640000
• Sum of all divisors σ(n): 298092642320
• Sum of proper divisors (its aliquot sum) s(n): 216949002320
• 81143640000 is an abundant number, because the sum of its proper divisors (216949002320) is greater than itself. Its abundance is 135805362320

Bases of 81143640000

• Binary: 1001011100100100010011010111111000000₂
• Hexadecimal: 0x12E489AFC0
• Base-36: 119YTTC0

Squares and roots of 81143640000

• 81143640000 squared (81143640000²) is 6584290312449600000000
• 81143640000 cubed (81143640000³) is 534273282768897860544000000000000
• The square root of 81143640000 is 284857.2273964625
• The cube root of 81143640000 is 4329.3047898285

Scales and comparisons

• 81,143,640,000 seconds is equal to 2,580 years, 6 weeks, 12 hours.
• To count from 1 to 81,143,640,000 would take you about five thousand, one hundred sixty 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 81143640000 cubic inches would be around 360.8 feet tall.

Recreational maths with 81143640000

• 81143640000 backwards is 00004634118
• 81143640000 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81143640000's digits is 27
• More coming soon!