257384630874 has 64 divisors (see below), whose sum is σ = 601396088832. Its totient is φ = 71905396800.

The previous prime is 257384630869. The next prime is 257384630887. The reversal of 257384630874 is 478036483752.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2032969 + ... + 2155859.

It is an arithmetic number, because the mean of its divisors is an integer number (9396813888).

Almost surely, 2^257384630874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257384630874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300698044416).

257384630874 is an abundant number, since it is smaller than the sum of its proper divisors (344011457958).

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

257384630874 is a wasteful number, since it uses less digits than its factorization.

257384630874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124011.

The product of its (nonzero) digits is 27095040, while the sum is 57.

The spelling of 257384630874 in words is "two hundred fifty-seven billion, three hundred eighty-four million, six hundred thirty thousand, eight hundred seventy-four".