257456536923 has 16 divisors (see below), whose sum is σ = 346815680256. Its totient is φ = 169868930400.

The previous prime is 257456536919. The next prime is 257456536933. The reversal of 257456536923 is 329635654752.

It is a happy number.

It is not a de Polignac number, because 257456536923 - 2² = 257456536919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257456536933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575290 + ... + 919712.

It is an arithmetic number, because the mean of its divisors is an integer number (21675980016).

Almost surely, 2^257456536923 is an apocalyptic number.

257456536923 is a deficient number, since it is larger than the sum of its proper divisors (89359143333).

257456536923 is a wasteful number, since it uses less digits than its factorization.

257456536923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346994.

The product of its digits is 40824000, while the sum is 57.

The spelling of 257456536923 in words is "two hundred fifty-seven billion, four hundred fifty-six million, five hundred thirty-six thousand, nine hundred twenty-three".