81420184320

Names of 81420184320

• Cardinal: 81420184320 can be written as Eighty-one billion, four hundred twenty million, one hundred eighty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.142018432 × 10¹⁰

Factors of 81420184320

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2065

Divisors of 81420184320

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 61 64 80 96 120 122 128 160 183 192 193 240 244 256 305 320 366 384 386 480 488 579 610 640 732 768 772 915 960 965 976 1158 1220 1280 1464 1544 1801 1830 1920 1930 1952 2316 2440 2895 2928 3088 3602 3660 3840 3860 3904 4632 4880 5403 5790 5856 6176 7204 7320 7720 7808 9005 9264 9760 10806 11580 11712 11773 12352 14408 14640 15440 15616 18010 18528 19520 21612 23160 23424 23546 24704 27015 28816 29280 30880 35319 36020 37056 39040 43224 46320 46848 47092 49408 54030 57632 58560 58865 61760 70638 72040 74112 78080 86448 92640 94184 108060 109861 115264 117120 117730 123520 141276 144080 148224 172896 176595 185280 188368 216120 219722 230528 234240 235460 247040 282552 288160 329583 345792 347593 353190 370560 376736 432240 439444 461056 470920 549305 565104 576320 659166 691584 695186 706380 741120 753472 864480 878888 941840 1042779 1098610 1130208 1152640 1318332 1383168 1390372 1412760 1506944 1647915 1728960 1737965 1757776 1883680 2085558 2197220 2260416 2305280 2636664 2780744 2825520 3013888 3295830 3457920 3475930 3515552 3767360 4171116 4394440 4520832 5213895 5273328 5561488 5651040 6591660 6915840 6951860 7031104 7534720 8342232 8788880 9041664 10427790 10546656 11122976 11302080 13183320 13903720 14062208 15069440 16684464 17577760 20855580 21093312 21203173 22245952 22604160 26366640 27807440 28124416 33368928 35155520 41711160 42186624 42406346 44491904 45208320 52733280 55614880 63609519 66737856 70311040 83422320 84373248 84812692 88983808 105466560 106015865 111229760 127219038 133475712 140622080 166844640 169625384 210933120 212031730 222459520 254438076 266951424 318047595 333689280 339250768 421866240 424063460 444919040 508876152 636095190 667378560 678501536 848126920 1017752304 1272190380 1334757120 1357003072 1696253840 2035504608 2544380760 2714006144 3392507680 4071009216 5088761520 5428012288 6785015360 8142018432 10177523040 13570030720 16284036864 20355046080 27140061440 40710092160 81420184320
• Sum of all divisors σ(n): 265815528384
• Sum of proper divisors (its aliquot sum) s(n): 184395344064
• 81420184320 is an abundant number, because the sum of its proper divisors (184395344064) is greater than itself. Its abundance is 102975159744

Bases of 81420184320

• Binary: 1001011110101000001010110101100000000₂
• Hexadecimal: 0x12F5056B00
• Base-36: 11EJH4AO

Squares and roots of 81420184320

• 81420184320 squared (81420184320²) is 6629246414702773862400
• 81420184320 cubed (81420184320³) is 539754464987799005891886317568000
• The square root of 81420184320 is 285342.2231636951
• The cube root of 81420184320 is 4334.2174242431

Scales and comparisons

• 81,420,184,320 seconds is equal to 2,588 years, 47 weeks, 2 days, 5 hours, 52 minutes.
• To count from 1 to 81,420,184,320 would take you about five thousand, one hundred seventy-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 81420184320 cubic inches would be around 361.2 feet tall.

Recreational maths with 81420184320

• 81420184320 backwards is 02348102418
• The number of decimal digits it has is: 11
• The sum of 81420184320's digits is 33
• More coming soon!