138161272781

Names of 138161272781

• Cardinal: 138161272781 can be written as One hundred thirty-eight billion, one hundred sixty-one million, two hundred seventy-two thousand, seven hundred eighty-one.

Scientific notation

• Scientific notation: 1.38161272781 × 10¹¹

Factors of 138161272781

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 5022

Divisors of 138161272781

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 17 31 41 119 193 217 287 527 697 1271 1351 3281 3689 4733 4879 5983 7913 8897 21607 22967 33131 41881 55391 80461 101711 134521 146723 151249 194053 245303 563227 711977 913469 941647 1027061 1358371 1717121 2494291 3298901 4170151 6015643 6394283 15528973 17460037 23092307 28317539 29191057 37452229 42109501 102265931 108702811 198222773 262165603 481398163 636687893 715861517 1161019099 3369787141 4456815251 8127133693 19737324683 138161272781
• Sum of all divisors σ(n): 177742688256
• Sum of proper divisors (its aliquot sum) s(n): 39581415475
• 138161272781 is a deficient number, because the sum of its proper divisors (39581415475) is less than itself. Its deficiency is 98579857306

Bases of 138161272781

• Binary: 10000000101011000011011011011111001101₂
• Hexadecimal: 0x202B0DB7CD
• Base-36: 1RGXNKCT

Squares and roots of 138161272781

• 138161272781 squared (138161272781²) is 19088537296465891473961
• 138161272781 cubed (138161272781³) is 2637296608407316299196267879555541
• The square root of 138161272781 is 371700.5149054813
• The cube root of 138161272781 is 5169.6615149897

Scales and comparisons

• 138,161,272,781 seconds is equal to 4,393 years, 5 weeks, 1 day, 19 hours, 19 minutes, 41 seconds.
• To count from 1 to 138,161,272,781 would take you about eight thousand, seven hundred eighty-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 138161272781 cubic inches would be around 430.8 feet tall.

Recreational maths with 138161272781

• 138161272781 backwards is 187272161831
• The number of decimal digits it has is: 12
• The sum of 138161272781's digits is 47
• More coming soon!