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68176400137 = 671017558211
BaseRepresentation
bin111111011111101000…
…010100111100001001
320111222022220222010221
4333133220110330021
52104111124301022
651153024510041
74632321560656
oct773750247411
9214868828127
1068176400137
1126a0588954a
121126817b321
1365766b3791
14342a758c2d
151b90494cc7
hexfdfa14f09

68176400137 has 4 divisors (see below), whose sum is σ = 69193958416. Its totient is φ = 67158841860.

The previous prime is 68176400129. The next prime is 68176400167. The reversal of 68176400137 is 73100467186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68176400137 - 23 = 68176400129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68176400093 and 68176400102.

It is not an unprimeable number, because it can be changed into a prime (68176400167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508779039 + ... + 508779172.

It is an arithmetic number, because the mean of its divisors is an integer number (17298489604).

Almost surely, 268176400137 is an apocalyptic number.

68176400137 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

68176400137 is a deficient number, since it is larger than the sum of its proper divisors (1017558279).

68176400137 is a wasteful number, since it uses less digits than its factorization.

68176400137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017558278.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 68176400137 in words is "sixty-eight billion, one hundred seventy-six million, four hundred thousand, one hundred thirty-seven".

Divisors: 1 67 1017558211 68176400137