138153738891

Names of 138153738891

• Cardinal: 138153738891 can be written as One hundred thirty-eight billion, one hundred fifty-three million, seven hundred thirty-eight thousand, eight hundred ninety-one.

Scientific notation

• Scientific notation: 1.38153738891 × 10¹¹

Factors of 138153738891

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 69265

Divisors of 138153738891

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 17 21 47 49 51 119 141 147 289 329 357 799 833 867 987 2023 2303 2397 2499 5593 6069 6909 13583 14161 16779 39151 40749 42483 69191 95081 117453 207573 285243 484337 665567 1176247 1453011 1996701 3251977 3390359 3528741 8233729 9755931 10171077 19996199 22763839 24701187 55283609 57636103 59988597 68291517 139973393 159346873 165850827 172908309 386985263 419920179 478040619 939821353 979813751 1160955789 2708896841 2819464059 2939441253 6578749471 8126690523 19736248413 46051246297 138153738891
• Sum of all divisors σ(n): 232471835136
• Sum of proper divisors (its aliquot sum) s(n): 94318096245
• 138153738891 is a deficient number, because the sum of its proper divisors (94318096245) is less than itself. Its deficiency is 43835642646

Bases of 138153738891

• Binary: 10000000101010100110101100001010001011₂
• Hexadecimal: 0x202A9AC28B
• Base-36: 1RGT6363

Squares and roots of 138153738891

• 138153738891 squared (138153738891²) is 19086455569562605909881
• 138153738891 cubed (138153738891³) is 2636865199112024943951233150881971
• The square root of 138153738891 is 371690.3804122459
• The cube root of 138153738891 is 5169.5675466187

Scales and comparisons

• 138,153,738,891 seconds is equal to 4,392 years, 44 weeks, 5 days, 14 hours, 34 minutes, 51 seconds.
• To count from 1 to 138,153,738,891 would take you about eight thousand, seven hundred eighty-five 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 138153738891 cubic inches would be around 430.8 feet tall.

Recreational maths with 138153738891

• 138153738891 backwards is 198837351831
• The number of decimal digits it has is: 12
• The sum of 138153738891's digits is 57
• More coming soon!