81520320000

Names of 81520320000

• Cardinal: 81520320000 can be written as Eighty-one billion, five hundred twenty million, three hundred twenty thousand.

Scientific notation

• Scientific notation: 8.152032 × 10¹⁰

Factors of 81520320000

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 1750

Divisors of 81520320000

• Number of divisors d(n): 600
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 25 28 30 32 35 40 42 48 49 50 56 60 64 70 75 80 84 96 98 100 105 112 120 125 128 140 147 150 160 168 175 192 196 200 210 224 240 245 250 256 280 294 300 320 336 350 375 384 392 400 420 448 480 490 500 512 525 560 588 600 625 640 672 700 735 750 768 784 800 840 875 896 960 980 1000 1050 1120 1176 1200 1225 1250 1280 1344 1400 1470 1500 1536 1568 1600 1680 1733 1750 1792 1875 1920 1960 2000 2100 2240 2352 2400 2450 2500 2560 2625 2688 2800 2940 3000 3136 3200 3360 3466 3500 3584 3675 3750 3840 3920 4000 4200 4375 4480 4704 4800 4900 5000 5199 5250 5376 5600 5880 6000 6125 6272 6400 6720 6932 7000 7350 7500 7680 7840 8000 8400 8665 8750 8960 9408 9600 9800 10000 10398 10500 10752 11200 11760 12000 12131 12250 12544 12800 13125 13440 13864 14000 14700 15000 15680 16000 16800 17330 17500 17920 18375 18816 19200 19600 20000 20796 21000 22400 23520 24000 24262 24500 25088 25995 26250 26880 27728 28000 29400 30000 30625 31360 32000 33600 34660 35000 36393 36750 37632 38400 39200 40000 41592 42000 43325 44800 47040 48000 48524 49000 51990 52500 53760 55456 56000 58800 60000 60655 61250 62720 64000 67200 69320 70000 72786 73500 75264 78400 80000 83184 84000 84917 86650 89600 91875 94080 96000 97048 98000 103980 105000 110912 112000 117600 120000 121310 122500 125440 129975 134400 138640 140000 145572 147000 156800 160000 166368 168000 169834 173300 181965 183750 188160 192000 194096 196000 207960 210000 216625 221824 224000 235200 240000 242620 245000 254751 259950 268800 277280 280000 291144 294000 303275 313600 320000 332736 336000 339668 346600 363930 367500 376320 388192 392000 415920 420000 424585 433250 443648 448000 470400 480000 485240 490000 509502 519900 554560 560000 582288 588000 606550 627200 649875 665472 672000 679336 693200 727860 735000 776384 784000 831840 840000 849170 866500 887296 909825 940800 960000 970480 980000 1019004 1039800 1083125 1109120 1120000 1164576 1176000 1213100 1273755 1299750 1330944 1344000 1358672 1386400 1455720 1470000 1516375 1552768 1568000 1663680 1680000 1698340 1733000 1819650 1881600 1940960 1960000 2038008 2079600 2122925 2166250 2218240 2240000 2329152 2352000 2426200 2547510 2599500 2661888 2717344 2772800 2911440 2940000 3032750 3105536 3136000 3249375 3327360 3360000 3396680 3466000 3639300 3881920 3920000 4076016 4159200 4245850 4332500 4436480 4549125 4658304 4704000 4852400 5095020 5199000 5434688 5545600 5822880 5880000 6065500 6211072 6368775 6498750 6654720 6720000 6793360 6932000 7278600 7581875 7763840 7840000 8152032 8318400 8491700 8665000 9098250 9316608 9408000 9704800 10190040 10398000 10614625 10869376 11091200 11645760 11760000 12131000 12737550 12997500 13309440 13586720 13864000 14557200 15163750 15527680 15680000 16304064 16636800 16983400 17330000 18196500 18633216 19409600 20380080 20796000 21229250 21738752 22182400 22745625 23291520 23520000 24262000 25475100 25995000 27173440 27728000 29114400 30327500 31055360 31843875 32608128 33273600 33966800 34660000 36393000 38819200 40760160 41592000 42458500 43477504 45491250 46583040 47040000 48524000 50950200 51990000 53073125 54346880 55456000 58228800 60655000 63687750 65216256 66547200 67933600 69320000 72786000 77638400 81520320 83184000 84917000 90982500 93166080 97048000 101900400 103980000 106146250 108693760 110912000 116457600 121310000 127375500 130432512 135867200 138640000 145572000 155276800 159219375 163040640 166368000 169834000 181965000 194096000 203800800 207960000 212292500 217387520 232915200 242620000 254751000 271734400 277280000 291144000 318438750 326081280 332736000 339668000 363930000 388192000 407601600 415920000 424585000 465830400 485240000 509502000 543468800 554560000 582288000 636877500 652162560 679336000 727860000 776384000 815203200 831840000 849170000 970480000 1019004000 1086937600 1164576000 1273755000 1358672000 1455720000 1630406400 1663680000 1698340000 1940960000 2038008000 2329152000 2547510000 2717344000 2911440000 3260812800 3396680000 3881920000 4076016000 5095020000 5434688000 5822880000 6793360000 8152032000 10190040000 11645760000 13586720000 16304064000 20380080000 27173440000 40760160000 81520320000
• Sum of all divisors σ(n): 315871619976
• Sum of proper divisors (its aliquot sum) s(n): 234351299976
• 81520320000 is an abundant number, because the sum of its proper divisors (234351299976) is greater than itself. Its abundance is 152830979976

Bases of 81520320000

• Binary: 1001011111010111111010101111000000000₂
• Hexadecimal: 0x12FAFD5E00
• Base-36: 11G73DHC

Squares and roots of 81520320000

• 81520320000 squared (81520320000²) is 6645562572902400000000
• 81520320000 cubed (81520320000³) is 541748387523026976768000000000000
• The square root of 81520320000 is 285517.6351821373
• The cube root of 81520320000 is 4335.9935276745

Scales and comparisons

• 81,520,320,000 seconds is equal to 2,592 years, 4 weeks, 6 days, 5 hours, 20 minutes.
• To count from 1 to 81,520,320,000 would take you about five thousand, one hundred eighty-four 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 81520320000 cubic inches would be around 361.3 feet tall.

Recreational maths with 81520320000

• 81520320000 backwards is 00002302518
• 81520320000 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81520320000's digits is 21
• More coming soon!