81363575664

Names of 81363575664

• Cardinal: 81363575664 can be written as Eighty-one billion, three hundred sixty-three million, five hundred seventy-five thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 8.1363575664 × 10¹⁰

Factors of 81363575664

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 26441

Divisors of 81363575664

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 19 21 23 24 28 36 38 42 46 48 49 56 57 63 69 72 76 84 92 98 112 114 126 133 138 144 147 152 161 168 171 184 196 207 228 252 266 276 294 304 322 336 342 368 392 399 414 437 441 456 483 504 532 552 588 644 684 784 798 828 874 882 912 931 966 1008 1064 1104 1127 1176 1197 1288 1311 1368 1449 1596 1656 1748 1764 1862 1932 2128 2254 2352 2394 2576 2622 2736 2793 2898 3059 3192 3312 3381 3496 3528 3724 3864 3933 4508 4788 5244 5586 5796 6118 6384 6762 6992 7056 7448 7728 7866 8379 9016 9177 9576 10143 10488 11172 11592 12236 13524 14896 15732 16758 18032 18354 19152 20286 20976 21413 22344 23184 24472 26387 27048 27531 31464 33516 36708 40572 42826 44688 48944 52774 54096 55062 62928 64239 67032 73416 79161 81144 85652 105548 110124 128478 134064 146832 158322 162288 171304 184709 192717 211096 220248 237483 256956 316644 342608 369418 385434 422192 440496 474966 501353 513912 554127 606901 633288 738836 770868 949932 1002706 1027824 1108254 1213802 1266576 1292963 1477672 1504059 1541736 1662381 1820703 1899864 2005412 2216508 2427604 2585926 2955344 3008118 3083472 3324762 3509471 3641406 3799728 3878889 4010824 4248307 4433016 4512177 4855208 5171852 5462109 6016236 6649524 7018942 7282812 7757778 8021648 8496614 8866032 9024354 9710416 10343704 10528413 10924218 11531119 11636667 12032472 12744921 13299048 14037884 14565624 15515556 16993228 18048708 20687408 21056826 21848436 23062238 23273334 24064944 24566297 25489842 26598096 28075768 29131248 29738149 31031112 31585239 33986456 34593357 36097416 38234763 42113652 43696872 46124476 46546668 49132594 50979684 56151536 59476298 62062224 63170478 67972912 69186714 72194832 73698891 76469526 80717833 84227304 87393744 89214447 92248952 93093336 98265188 101959368 103780071 118952596 126340956 138373428 147397782 152939052 161435666 168454608 178428894 184497904 186186672 196530376 203918736 207560142 221096673 237905192 242153499 252681912 267643341 276746856 294795564 305878104 322871332 356857788 393060752 415120284 442193346 475810384 484306998 505363824 535286682 553493712 565024831 589591128 611756208 645742664 713715576 726460497 830240568 884386692 968613996 1070573364 1130049662 1179182256 1291485328 1427431152 1452920994 1660481136 1695074493 1768773384 1937227992 2141146728 2260099324 2905841988 3390148986 3537546768 3874455984 4282293456 4520198648 5085223479 5811683976 6780297972 9040397296 10170446958 11623367952 13560595944 20340893916 27121191888 40681787832 81363575664
• Sum of all divisors σ(n): 290956199040
• Sum of proper divisors (its aliquot sum) s(n): 209592623376
• 81363575664 is an abundant number, because the sum of its proper divisors (209592623376) is greater than itself. Its abundance is 128229047712

Bases of 81363575664

• Binary: 1001011110001101001011010001101110000₂
• Hexadecimal: 0x12F1A5A370
• Base-36: 11DLRSS0

Squares and roots of 81363575664

• 81363575664 squared (81363575664²) is 6620031444831453040896
• 81363575664 cubed (81363575664³) is 538629429359603171220004582354944
• The square root of 81363575664 is 285243.0115953763
• The cube root of 81363575664 is 4333.2127138865

Scales and comparisons

• 81,363,575,664 seconds is equal to 2,587 years, 5 weeks, 5 days, 1 hour, 14 minutes, 24 seconds.
• To count from 1 to 81,363,575,664 would take you about five thousand, one hundred seventy-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 81363575664 cubic inches would be around 361.1 feet tall.

Recreational maths with 81363575664

• 81363575664 backwards is 46657536318
• The number of decimal digits it has is: 11
• The sum of 81363575664's digits is 54
• More coming soon!