81618420007904

Names of 81618420007904

• Cardinal: 81618420007904 can be written as Eighty-one trillion, six hundred eighteen billion, four hundred twenty million, seven thousand, nine hundred four.

Scientific notation

• Scientific notation: 8.1618420007904 × 10¹³

Factors of 81618420007904

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1066

Divisors of 81618420007904

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 104 169 208 338 416 676 1051 1352 2102 2197 2704 4204 4394 5408 8408 8788 13663 16816 17576 27326 33632 35152 54652 70304 109304 177619 218608 355238 437216 710476 1104601 1420952 2209202 2309047 2841904 4418404 4618094 5683808 8836808 9236188 14359813 17673616 18472376 28719626 35347232 36944752 57439252 73889504 114878504 186677569 229757008 373355138 459514016 746710276 1160935651 1493420552 2321871302 2426808397 2986841104 4643742604 4853616794 5973682208 9287485208 9707233588 15092163463 18574970416 19414467176 30184326926 37149940832 38828934352 60368653852 77657868704 120737307704 196198125019 241474615408 392396250038 482949230816 784792500076 1569585000152 2550575625247 3139170000304 5101151250494 6278340000608 10202302500988 20404605001976 40809210003952 81618420007904
• Sum of all divisors σ(n): 174236473121760
• Sum of proper divisors (its aliquot sum) s(n): 92618053113856
• 81618420007904 is an abundant number, because the sum of its proper divisors (92618053113856) is greater than itself. Its abundance is 10999633105952

Bases of 81618420007904

• Binary: 10010100011101101000100111011101000001111100000₂
• Hexadecimal: 0x4A3B44EE83E0
• Base-36: SXIZFY40W

Squares and roots of 81618420007904

• 81618420007904 squared (81618420007904²) is 6661566484586623983422473216
• 81618420007904 cubed (81618420007904³) is 543706531249567624155221132347209948299264
• The square root of 81618420007904 is 9034291.3395519847
• The cube root of 81618420007904 is 43377.3211460831

Scales and comparisons

• 81,618,420,007,904 seconds is equal to 2,595,213 years, 15 weeks, 1 day, 23 hours, 31 minutes, 44 seconds.
• To count from 1 to 81,618,420,007,904 would take you about six million, four hundred eighty-eight thousand and thirty-three 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 81618420007904 cubic inches would be around 3614.8 feet tall.

Recreational maths with 81618420007904

• 81618420007904 backwards is 40970002481618
• The number of decimal digits it has is: 14
• The sum of 81618420007904's digits is 50
• More coming soon!