257531749363864 has 32 divisors (see below), whose sum is σ = 490122376210800. Its totient is φ = 126832788656640.

The previous prime is 257531749363841. The next prime is 257531749363927. The reversal of 257531749363864 is 468363947135752.

It is a congruent number.

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, 15152229 + ... + 27288340.

Almost surely, 2^{257531749363864} is an apocalyptic number.

It is an amenable number.

257531749363864 is a deficient number, since it is larger than the sum of its proper divisors (232590626846936).

257531749363864 is a wasteful number, since it uses less digits than its factorization.

257531749363864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42451963 (or 42451959 counting only the distinct ones).

The product of its digits is 2743372800, while the sum is 73.

The spelling of 257531749363864 in words is "two hundred fifty-seven trillion, five hundred thirty-one billion, seven hundred forty-nine million, three hundred sixty-three thousand, eight hundred sixty-four".