81240316040

Names of 81240316040

• Cardinal: 81240316040 can be written as Eighty-one billion, two hundred forty million, three hundred sixteen thousand and forty.

Scientific notation

• Scientific notation: 8.124031604 × 10¹⁰

Factors of 81240316040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 3031

Divisors of 81240316040

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 8 10 13 17 20 26 34 40 52 65 68 85 104 130 136 170 193 221 260 289 340 386 442 520 578 680 772 884 965 1105 1156 1445 1544 1768 1930 2210 2312 2509 2801 2890 3281 3757 3860 4420 5018 5602 5780 6562 7514 7720 8840 10036 11204 11560 12545 13124 14005 15028 16405 18785 20072 22408 25090 26248 28010 30056 32810 36413 37570 42653 47617 50180 55777 56020 65620 72826 75140 85306 95234 100360 111554 112040 131240 145652 150280 170612 182065 190468 213265 223108 238085 278885 291304 341224 364130 380936 426530 446216 476170 540593 557770 619021 725101 728260 809489 853060 952340 1081186 1115540 1238042 1450202 1456520 1618978 1706120 1904680 2162372 2231080 2476084 2702965 2900404 3095105 3237956 3625505 4047445 4324744 4952168 5405930 5800808 6190210 6475912 7027709 7251010 8094890 9190081 10523357 10811860 12380420 14055418 14502020 16189780 18380162 21046714 21623720 24760840 28110836 29004040 32379560 35138545 36760324 42093428 45950405 52616785 56221672 70277090 73520648 84186856 91900810 105233570 119471053 140554180 156231377 183801620 210467140 238942106 281108360 312462754 367603240 420934280 477884212 597355265 624925508 781156885 955768424 1194710530 1249851016 1562313770 2031007901 2389421060 3124627540 4062015802 4778842120 6249255080 8124031604 10155039505 16248063208 20310079010 40620158020 81240316040
• Sum of all divisors σ(n): 210270710160
• Sum of proper divisors (its aliquot sum) s(n): 129030394120
• 81240316040 is an abundant number, because the sum of its proper divisors (129030394120) is greater than itself. Its abundance is 47790078080

Bases of 81240316040

• Binary: 1001011101010010011001101100010001000₂
• Hexadecimal: 0x12EA4CD888
• Base-36: 11BKDX1K

Squares and roots of 81240316040

• 81240316040 squared (81240316040²) is 6599988950279081281600
• 81240316040 cubed (81240316040³) is 536185188181180409518032236864000
• The square root of 81240316040 is 285026.8689790491
• The cube root of 81240316040 is 4331.0234455119

Scales and comparisons

• 81,240,316,040 seconds is equal to 2,583 years, 9 weeks, 6 days, 10 hours, 27 minutes, 20 seconds.
• To count from 1 to 81,240,316,040 would take you about five thousand, one hundred sixty-six 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 81240316040 cubic inches would be around 360.9 feet tall.

Recreational maths with 81240316040

• 81240316040 backwards is 04061304218
• The number of decimal digits it has is: 11
• The sum of 81240316040's digits is 29
• More coming soon!