257261366404 has 36 divisors (see below), whose sum is σ = 543028168704. Its totient is φ = 104451979248.

The previous prime is 257261366387. The next prime is 257261366413. The reversal of 257261366404 is 404663162752.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12715524 + ... + 12735739.

Almost surely, 2^257261366404 is an apocalyptic number.

It is an amenable number.

257261366404 is an abundant number, since it is smaller than the sum of its proper divisors (285766802300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257261366404 is a wasteful number, since it uses less digits than its factorization.

257261366404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25451312 (or 25451291 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 257261366404 in words is "two hundred fifty-seven billion, two hundred sixty-one million, three hundred sixty-six thousand, four hundred four".