638838397078385

Names of 638838397078385

• Cardinal: 638838397078385 can be written as Six hundred thirty-eight trillion, eight hundred thirty-eight billion, three hundred ninety-seven million, seventy-eight thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 6.38838397078385 × 10¹⁴

Factors of 638838397078385

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 183315

Divisors of 638838397078385

• Number of divisors d(n): 128
• Complete list of divisors:
  1 5 7 17 31 35 41 85 119 155 205 217 287 527 595 697 1085 1271 1435 2635 3485 3689 4733 4879 6355 8897 18445 21607 23665 24395 33131 44485 80461 108035 146723 151249 165655 178481 194053 402305 563227 733615 756245 892405 970265 1027061 1249367 1358371 2494291 2816135 3034177 3298901 5135305 5532911 6015643 6246835 6791855 7317721 12471455 15170885 16494505 17460037 21239239 23092307 27664555 30078215 36588605 38730377 42109501 51224047 87300185 94059487 102265931 106196195 115461535 124401257 193651885 210547505 226849351 256120235 470297435 511329655 622006285 658416409 715861517 844750573 870808799 1134246755 1587945457 3292082045 3579307585 3856438967 4223752865 4354043995 5913254011 7939727285 14360759741 19282194835 26187267763 26995072769 29566270055 34634773493 71803798705 100525318187 130936338815 134975363845 173173867465 183310874341 242443414451 445183551971 502626590935 588791149381 916554371705 1073677978283 1212217072255 2225917759855 2943955746905 3116284863797 4121538045667 5368389891415 7515745847981 15581424318985 18252525630811 20607690228335 37578729239905 91262628154055 127767679415677 638838397078385
• Sum of all divisors σ(n): 981150633566208
• Sum of proper divisors (its aliquot sum) s(n): 342312236487823
• 638838397078385 is a deficient number, because the sum of its proper divisors (342312236487823) is less than itself. Its deficiency is 296526160590562

Bases of 638838397078385

• Binary: 10010001010000010100100111101110100000101101110001₂
• Hexadecimal: 0x2450527BA0B71
• Base-36: 6AG6B3AV75

Squares and roots of 638838397078385

• 638838397078385 squared (638838397078385²) is 408114497581680304503834208225
• 638838397078385 cubed (638838397078385³) is 260719211459531077188641336604756259736716625
• The square root of 638838397078385 is 25275252.6610197311
• The cube root of 638838397078385 is 86125.2185755609

Scales and comparisons

• 638,838,397,078,385 seconds is equal to 20,313,084 years, 50 weeks, 3 days, 3 hours, 33 minutes, 5 seconds.
• To count from 1 to 638,838,397,078,385 would take you about fifty million, seven hundred eighty-two thousand, seven hundred twelve 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 638838397078385 cubic inches would be around 7177.1 feet tall.

Recreational maths with 638838397078385

• 638838397078385 backwards is 583870793838836
• The number of decimal digits it has is: 15
• The sum of 638838397078385's digits is 86
• More coming soon!