18145155990

Names of 18145155990

• Cardinal: 18145155990 can be written as Eighteen billion, one hundred forty-five million, one hundred fifty-five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.814515599 × 10¹⁰

Factors of 18145155990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 401

Divisors of 18145155990

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 5 6 10 13 15 19 26 30 38 39 57 65 78 95 114 130 190 195 247 285 359 361 390 494 570 718 722 741 1077 1083 1235 1482 1795 1805 2154 2166 2470 3590 3610 3705 4667 4693 5385 5415 6821 7410 9334 9386 10770 10830 13642 14001 14079 20463 23335 23465 28002 28158 34105 40926 46670 46930 68210 70005 70395 88673 102315 128881 129599 140010 140790 177346 204630 257762 259198 266019 386643 388797 443365 532038 644405 647995 773286 777594 886730 1288810 1295990 1330095 1675453 1684787 1933215 1943985 2448739 2660190 3350906 3369574 3866430 3887970 4897478 5026359 5054361 7346217 8377265 8423935 10052718 10108722 12243695 14692434 16754530 16847870 24487390 25131795 25271805 31833607 36731085 46526041 50263590 50543610 63667214 73462170 93052082 95500821 139578123 159168035 191001642 232630205 279156246 318336070 465260410 477504105 604838533 697890615 955008210 1209677066 1395781230 1814515599 3024192665 3629031198 6048385330 9072577995 18145155990
• Sum of all divisors σ(n): 49634747568
• Sum of proper divisors (its aliquot sum) s(n): 31489591578
• 18145155990 is an abundant number, because the sum of its proper divisors (31489591578) is greater than itself. Its abundance is 13344435588

Bases of 18145155990

• Binary: 10000111001100010010001101110010110₂
• Hexadecimal: 0x439891B96
• Base-36: 8C35NYU

Squares and roots of 18145155990

• 18145155990 squared (18145155990²) is 329246685901432880100
• 18145155990 cubed (18145155990³) is 5974232474872033373929466799000
• The square root of 18145155990 is 134703.9568461149
• The cube root of 18145155990 is 2627.7672883067

Scales and comparisons

• 18,145,155,990 seconds is equal to 576 years, 49 weeks, 6 days, 9 hours, 6 minutes, 30 seconds.
• To count from 1 to 18,145,155,990 would take you about one thousand, one hundred fifty-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 18145155990 cubic inches would be around 219 feet tall.

Recreational maths with 18145155990

• 18145155990 backwards is 09955154181
• The number of decimal digits it has is: 11
• The sum of 18145155990's digits is 48
• More coming soon!