257904725871 has 32 divisors (see below), whose sum is σ = 381182312448. Its totient is φ = 154110539520.

The previous prime is 257904725851. The next prime is 257904725899. The reversal of 257904725871 is 178527409752.

It is a happy number.

It is not a de Polignac number, because 257904725871 - 2¹¹ = 257904723823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257904725851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321150 + ... + 786731.

It is an arithmetic number, because the mean of its divisors is an integer number (11911947264).

Almost surely, 2^257904725871 is an apocalyptic number.

257904725871 is a deficient number, since it is larger than the sum of its proper divisors (123277586577).

257904725871 is a wasteful number, since it uses less digits than its factorization.

257904725871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108071.

The product of its (nonzero) digits is 9878400, while the sum is 57.

The spelling of 257904725871 in words is "two hundred fifty-seven billion, nine hundred four million, seven hundred twenty-five thousand, eight hundred seventy-one".