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68177111154 = 2318397617647
BaseRepresentation
bin111111011111101011…
…000010100001110010
320111222101021002110220
4333133223002201302
52104111320024104
651153052033510
74632330611625
oct773753024162
9214871232426
1068177111154
1126a06224769
1211268462896
1365768a22b9
14342a8a1dbc
151b905857d9
hexfdfac2872

68177111154 has 16 divisors (see below), whose sum is σ = 136361854848. Its totient is φ = 22724431632.

The previous prime is 68177111137. The next prime is 68177111161. The reversal of 68177111154 is 45111177186.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198442 + ... + 419205.

It is an arithmetic number, because the mean of its divisors is an integer number (8522615928).

Almost surely, 268177111154 is an apocalyptic number.

68177111154 is an abundant number, since it is smaller than the sum of its proper divisors (68184743694).

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

68177111154 is a wasteful number, since it uses less digits than its factorization.

68177111154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636049.

The product of its digits is 47040, while the sum is 42.

The spelling of 68177111154 in words is "sixty-eight billion, one hundred seventy-seven million, one hundred eleven thousand, one hundred fifty-four".

Divisors: 1 2 3 6 18397 36794 55191 110382 617647 1235294 1852941 3705882 11362851859 22725703718 34088555577 68177111154