81797521680

Names of 81797521680

• Cardinal: 81797521680 can be written as Eighty-one billion, seven hundred ninety-seven million, five hundred twenty-one thousand, six hundred eighty.

Scientific notation

• Scientific notation: 8.179752168 × 10¹⁰

Factors of 81797521680

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 284767

Divisors of 81797521680

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 19 20 21 24 27 28 30 35 36 38 40 42 45 48 54 56 57 60 63 70 72 76 80 84 90 95 105 108 112 114 120 126 133 135 140 144 152 168 171 180 189 190 210 216 228 240 252 266 270 280 285 304 315 336 342 360 378 380 399 420 432 456 504 513 532 540 560 570 630 665 684 720 756 760 798 840 855 912 945 1008 1026 1064 1080 1140 1197 1260 1330 1368 1512 1520 1596 1680 1710 1890 1995 2052 2128 2160 2280 2394 2520 2565 2660 2736 3024 3192 3420 3591 3780 3990 4104 4560 4788 5040 5130 5320 5985 6384 6840 7182 7560 7980 8208 9576 10260 10640 11970 13680 14364 15120 15960 17955 19152 20520 23940 28728 31920 35910 41040 47880 57456 71820 95760 143640 284731 287280 569462 854193 1138924 1423655 1708386 1993117 2277848 2562579 2847310 3416772 3986234 4270965 4555696 5125158 5409889 5694620 5979351 6833544 7687737 7972468 8541930 9965585 10250316 10819778 11389240 11958702 12812895 13667088 15375474 15944936 16229667 17083860 17938053 19931170 20500632 21639556 22778480 23917404 25625790 27049445 29896755 30750948 31889872 32459334 34167720 35876106 37869223 38438685 39862340 41001264 43279112 47834808 48689001 51251580 53814159 54098890 59793510 61501896 64918668 68335440 71752212 75738446 76877370 79724680 81148335 86558224 89690265 95669616 97378002 102503160 107628318 108197780 113607669 119587020 123003792 129837336 143504424 146067003 151476892 153754740 159449360 162296670 179380530 189346115 194756004 205006320 215256636 216395560 227215338 239174040 243445005 259674672 269070795 287008848 292134006 302953784 307509480 324593340 340823007 358761060 378692230 389512008 430513272 432791120 454430676 478348080 486890010 538141590 568038345 584268012 605907568 615018960 649186680 681646014 717522120 730335015 757384460 779024016 861026544 908861352 973780020 1022469021 1076283180 1136076690 1168536024 1298373360 1363292028 1435044240 1460670030 1514768920 1704115035 1817722704 1947560040 2044938042 2152566360 2272153380 2337072048 2726584056 2921340060 3029537840 3408230070 3895120080 4089876084 4305132720 4544306760 5112345105 5453168112 5842680120 6816460140 8179752168 9088613520 10224690210 11685360240 13632920280 16359504336 20449380420 27265840560 40898760840 81797521680
• Sum of all divisors σ(n): 338944972800
• Sum of proper divisors (its aliquot sum) s(n): 257147451120
• 81797521680 is an abundant number, because the sum of its proper divisors (257147451120) is greater than itself. Its abundance is 175349929440

Bases of 81797521680

• Binary: 1001100001011100000110010000100010000₂
• Hexadecimal: 0x130B832110
• Base-36: 11KS4RO0

Squares and roots of 81797521680

• 81797521680 squared (81797521680²) is 6690834552990070022400
• 81797521680 cubed (81797521680³) is 547293684405498361481982085632000
• The square root of 81797521680 is 286002.6602673479
• The cube root of 81797521680 is 4340.9026713663

Scales and comparisons

• 81,797,521,680 seconds is equal to 2,600 years, 47 weeks, 1 day, 13 hours, 48 minutes.
• To count from 1 to 81,797,521,680 would take you about five thousand, two hundred 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 81797521680 cubic inches would be around 361.7 feet tall.

Recreational maths with 81797521680

• 81797521680 backwards is 08612579718
• 81797521680 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81797521680's digits is 54
• More coming soon!