257530991732 has 24 divisors (see below), whose sum is σ = 515074405440. Its totient is φ = 110367763200.

The previous prime is 257530991639. The next prime is 257530991759. The reversal of 257530991732 is 237199035752.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 1462319 + ... + 1628937.

It is an arithmetic number, because the mean of its divisors is an integer number (21461433560).

Almost surely, 2^257530991732 is an apocalyptic number.

It is an amenable number.

257530991732 is an abundant number, since it is smaller than the sum of its proper divisors (257543413708).

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

257530991732 is a wasteful number, since it uses less digits than its factorization.

257530991732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221831 (or 221829 counting only the distinct ones).

The product of its (nonzero) digits is 3572100, while the sum is 53.

The spelling of 257530991732 in words is "two hundred fifty-seven billion, five hundred thirty million, nine hundred ninety-one thousand, seven hundred thirty-two".