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68184370408 = 23711287938447
BaseRepresentation
bin111111100000000110…
…101110110011101000
320111222212220220022011
4333200012232303220
52104120144323113
651153511405304
74632446404630
oct774006566350
9214885826264
1068184370408
1126a0a332750
121126a983834
13657824450b
14342b8316c0
151b9101b63d
hexfe01aece8

68184370408 has 64 divisors (see below), whose sum is σ = 159451545600. Its totient is φ = 26555421120.

The previous prime is 68184370403. The next prime is 68184370409. The reversal of 68184370408 is 80407348186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68184370403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1754241 + ... + 1792687.

It is an arithmetic number, because the mean of its divisors is an integer number (2491430400).

Almost surely, 268184370408 is an apocalyptic number.

It is an amenable number.

68184370408 is an abundant number, since it is smaller than the sum of its proper divisors (91267175192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68184370408 is a wasteful number, since it uses less digits than its factorization.

68184370408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41350 (or 41346 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 68184370408 in words is "sixty-eight billion, one hundred eighty-four million, three hundred seventy thousand, four hundred eight".

Divisors: 1 2 4 7 8 11 14 22 28 44 56 77 88 154 308 616 2879 5758 11516 20153 23032 31669 38447 40306 63338 76894 80612 126676 153788 161224 221683 253352 269129 307576 422917 443366 538258 845834 886732 1076516 1691668 1773464 2153032 2960419 3383336 5920838 11841676 23683352 110688913 221377826 442755652 774822391 885511304 1217578043 1549644782 2435156086 3099289564 4870312172 6198579128 8523046301 9740624344 17046092602 34092185204 68184370408