81321621732

Names of 81321621732

• Cardinal: 81321621732 can be written as Eighty-one billion, three hundred twenty-one million, six hundred twenty-one thousand, seven hundred thirty-two.

Scientific notation

• Scientific notation: 8.1321621732 × 10¹⁰

Factors of 81321621732

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 979

Divisors of 81321621732

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 6 9 12 13 18 23 26 27 36 39 46 52 54 69 78 92 108 117 138 156 169 207 234 276 299 307 338 351 414 468 507 598 614 621 631 676 702 828 897 921 1014 1196 1228 1242 1262 1404 1521 1794 1842 1893 2028 2484 2524 2691 2763 3042 3588 3684 3786 3887 3991 4563 5382 5526 5679 6084 7061 7572 7774 7982 8073 8203 8289 9126 10764 11052 11358 11661 11973 14122 14513 15548 15964 16146 16406 16578 17037 18252 21183 22716 23322 23946 24609 28244 29026 32292 32812 33156 34074 34983 35919 42366 43539 46644 47892 49218 51883 58052 63549 68148 69966 71838 73827 84732 87078 91793 98436 103766 104949 106639 107757 127098 130617 139932 143676 147654 155649 174156 183586 188669 190647 193717 207532 209898 213278 215514 221481 254196 261234 275379 295308 311298 319917 367172 377338 381294 387434 391851 419796 426556 431028 442962 466947 522468 550758 566007 581151 622596 639834 754676 762588 774868 783702 826137 885924 933894 959751 1101516 1132014 1162302 1193309 1279668 1400841 1567404 1652274 1698021 1743453 1867788 1919502 2264028 2324604 2386618 2452697 2478411 2518321 2801682 2879253 3304548 3396042 3486906 3579927 3839004 4455491 4773236 4905394 4956822 5036642 5094063 5230359 5603364 5758506 6792084 6973812 7159854 7358091 7554963 8910982 9810788 9913644 10073284 10188126 10460718 10739781 11517012 13366473 14319708 14716182 15109926 17821964 20376252 20921436 21479562 22074273 22664889 26732946 29432364 30219852 32219343 32738173 40099419 42959124 44148546 45329778 53465892 57921383 64438686 65476346 66222819 67994667 80198838 88297092 90659556 98214519 115842766 120298257 128877372 130952692 132445638 135989334 160397676 173764149 196429038 231685532 240596514 264891276 271978668 294643557 347528298 392858076 481193028 521292447 589287114 695056596 752977979 883930671 1042584894 1178574228 1505955958 1563877341 1767861342 2085169788 2258933937 3011911916 3127754682 3535722684 4517867874 6255509364 6776801811 9035735748 13553603622 20330405433 27107207244 40660810866 81321621732
• Sum of all divisors σ(n): 239380162560
• Sum of proper divisors (its aliquot sum) s(n): 158058540828
• 81321621732 is an abundant number, because the sum of its proper divisors (158058540828) is greater than itself. Its abundance is 76736919096

Bases of 81321621732

• Binary: 1001011101111001001010111100011100100₂
• Hexadecimal: 0x12EF2578E4
• Base-36: 11CWSKX0

Squares and roots of 81321621732

• 81321621732 squared (81321621732²) is 6613206161122494679824
• 81321621732 cubed (81321621732³) is 537796649870535356868829780335168
• The square root of 81321621732 is 285169.4614295157
• The cube root of 81321621732 is 4332.4678000201

Scales and comparisons

• 81,321,621,732 seconds is equal to 2,585 years, 40 weeks, 2 days, 11 hours, 22 minutes, 12 seconds.
• To count from 1 to 81,321,621,732 would take you about five thousand, one hundred seventy-one 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 81321621732 cubic inches would be around 361 feet tall.

Recreational maths with 81321621732

• 81321621732 backwards is 23712612318
• 81321621732 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81321621732's digits is 36
• More coming soon!