257904725870 has 16 divisors (see below), whose sum is σ = 506431098288. Its totient is φ = 93783536640.

The previous prime is 257904725851. The next prime is 257904725899. The reversal of 257904725870 is 78527409752.

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, 1172294099 + ... + 1172294318.

It is an arithmetic number, because the mean of its divisors is an integer number (31651943643).

Almost surely, 2^257904725870 is an apocalyptic number.

257904725870 is a deficient number, since it is larger than the sum of its proper divisors (248526372418).

257904725870 is a wasteful number, since it uses less digits than its factorization.

257904725870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344588435.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 257904725870 in words is "two hundred fifty-seven billion, nine hundred four million, seven hundred twenty-five thousand, eight hundred seventy".