68207605257 has 12 divisors (see below), whose sum is σ = 99962661680. Its totient is φ = 41337942360.

The previous prime is 68207605247. The next prime is 68207605273. The reversal of 68207605257 is 75250670286.

It is not a de Polignac number, because 68207605257 - 2⁷ = 68207605129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68207605217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93949507 + ... + 93950232.

Almost surely, 2^68207605257 is an apocalyptic number.

It is an amenable number.

68207605257 is a deficient number, since it is larger than the sum of its proper divisors (31755056423).

68207605257 is a wasteful number, since it uses less digits than its factorization.

68207605257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187899764 (or 187899753 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 68207605257 in words is "sixty-eight billion, two hundred seven million, six hundred five thousand, two hundred fifty-seven".