81264123200

Names of 81264123200

• Cardinal: 81264123200 can be written as Eighty-one billion, two hundred sixty-four million, one hundred twenty-three thousand, two hundred.

Scientific notation

• Scientific notation: 8.12641232 × 10¹⁰

Factors of 81264123200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 2186

Divisors of 81264123200

• Number of divisors d(n): 252
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 25 26 32 40 50 52 64 65 80 100 104 130 149 160 169 200 208 260 298 320 325 338 400 416 520 596 650 676 745 800 832 845 1040 1192 1300 1352 1490 1600 1690 1937 2017 2080 2384 2600 2704 2980 3380 3725 3874 4034 4160 4225 4768 5200 5408 5960 6760 7450 7748 8068 8450 9536 9685 10085 10400 10816 11920 13520 14900 15496 16136 16900 19370 20170 20800 23840 25181 26221 27040 29800 30992 32272 33800 38740 40340 47680 48425 50362 50425 52442 54080 59600 61984 64544 67600 77480 80680 96850 100724 100850 104884 119200 123968 125905 129088 131105 135200 154960 161360 193700 201448 201700 209768 238400 251810 262210 270400 300533 309920 322720 340873 387400 402896 403400 419536 503620 524420 601066 619840 629525 645440 655525 681746 774800 805792 806800 839072 1007240 1048840 1202132 1259050 1311050 1363492 1502665 1549600 1611584 1613600 1678144 1704365 2014480 2097680 2404264 2518100 2622100 2726984 3005330 3099200 3227200 3408730 3906929 4028960 4195360 4808528 5036200 5244200 5453968 6010660 6817460 7513325 7813858 8057920 8390720 8521825 9617056 10072400 10488400 10907936 12021320 13634920 15026650 15627716 17043650 19234112 19534645 20144800 20976800 21815872 24042640 27269840 30053300 31255432 34087300 39069290 40289600 41953600 48085280 50790077 54539680 60106600 62510864 68174600 78138580 96170560 97673225 101580154 109079360 120213200 125021728 136349200 156277160 195346450 203160308 240426400 250043456 253950385 272698400 312554320 390692900 406320616 480852800 507900770 545396800 625108640 781385800 812641232 1015801540 1250217280 1269751925 1562771600 1625282464 2031603080 2539503850 3125543200 3250564928 4063206160 5079007700 6251086400 8126412320 10158015400 16252824640 20316030800 40632061600 81264123200
• Sum of all divisors σ(n): 218086571700
• Sum of proper divisors (its aliquot sum) s(n): 136822448500
• 81264123200 is an abundant number, because the sum of its proper divisors (136822448500) is greater than itself. Its abundance is 55558325300

Bases of 81264123200

• Binary: 1001011101011101110000001110101000000₂
• Hexadecimal: 0x12EBB81D40
• Base-36: 11BYK6RK

Squares and roots of 81264123200

• 81264123200 squared (81264123200²) is 6603857719464778240000
• 81264123200 cubed (81264123200³) is 536656707309856776956039168000000
• The square root of 81264123200 is 285068.6289299473
• The cube root of 81264123200 is 4331.4464674089

Scales and comparisons

• 81,264,123,200 seconds is equal to 2,583 years, 49 weeks, 1 day, 23 hours, 33 minutes, 20 seconds.
• To count from 1 to 81,264,123,200 would take you about five thousand, one hundred sixty-seven 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 81264123200 cubic inches would be around 361 feet tall.

Recreational maths with 81264123200

• 81264123200 backwards is 00232146218
• The number of decimal digits it has is: 11
• The sum of 81264123200's digits is 29
• More coming soon!