81027013872

Names of 81027013872

• Cardinal: 81027013872 can be written as Eighty-one billion, twenty-seven million, thirteen thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 8.1027013872 × 10¹⁰

Factors of 81027013872

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1703

Divisors of 81027013872

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 67 84 98 112 134 147 168 196 201 268 294 336 392 402 431 469 536 588 784 804 862 938 1072 1176 1193 1293 1407 1608 1724 1876 2352 2386 2586 2814 3017 3216 3283 3448 3579 3752 4772 5172 5628 6034 6566 6896 7158 7504 8351 9051 9544 9849 10344 11256 12068 13132 14316 16702 18102 19088 19698 20688 21119 22512 24136 25053 26264 28632 28877 33404 36204 39396 42238 48272 50106 52528 57264 57754 58457 63357 66808 72408 78792 79931 84476 86631 100212 115508 116914 126714 133616 144816 157584 159862 168952 173262 175371 200424 202139 231016 233828 239793 253428 319724 337904 346524 350742 400848 404278 462032 467656 479586 506856 514183 559517 606417 639448 693048 701484 808556 935312 959172 1013712 1028366 1119034 1212834 1278896 1386096 1402968 1414973 1542549 1617112 1678551 1918344 2056732 2238068 2425668 2805936 2829946 3085098 3234224 3357102 3599281 3836688 3916619 4113464 4244919 4476136 4851336 5659892 6170196 6714204 7198562 7833238 8226928 8489838 8952272 9702672 10797843 11319784 11749857 12340392 13428408 14397124 15666476 16979676 21595686 22639568 23499714 24680784 25194967 26856816 28794248 31332952 33959352 34450261 43191372 46999428 50389934 57588496 62665904 67918704 68900522 75584901 86382744 93998856 100779868 103350783 137801044 151169802 172765488 187997712 201559736 206701566 241151827 275602088 302339604 403119472 413403132 482303654 551204176 604679208 723455481 826806264 964607308 1209358416 1446910962 1653612528 1688062789 1929214616 2893821924 3376125578 3858429232 5064188367 5787643848 6752251156 10128376734 11575287696 13504502312 20256753468 27009004624 40513506936 81027013872
• Sum of all divisors σ(n): 247909704192
• Sum of proper divisors (its aliquot sum) s(n): 166882690320
• 81027013872 is an abundant number, because the sum of its proper divisors (166882690320) is greater than itself. Its abundance is 85855676448

Bases of 81027013872

• Binary: 1001011011101100101100001110011110000₂
• Hexadecimal: 0x12DD961CF0
• Base-36: 1181E41C

Squares and roots of 81027013872

• 81027013872 squared (81027013872²) is 6565376977013280432384
• 81027013872 cubed (81027013872³) is 531972891391364498723004526030848
• The square root of 81027013872 is 284652.4439944263
• The cube root of 81027013872 is 4327.2296543161

Scales and comparisons

• 81,027,013,872 seconds is equal to 2,576 years, 21 weeks, 1 day, 15 hours, 51 minutes, 12 seconds.
• To count from 1 to 81,027,013,872 would take you about five thousand, one hundred fifty-two 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 81027013872 cubic inches would be around 360.6 feet tall.

Recreational maths with 81027013872

• 81027013872 backwards is 27831072018
• The number of decimal digits it has is: 11
• The sum of 81027013872's digits is 39
• More coming soon!