257499997632 has 84 divisors (see below), whose sum is σ = 738172758856. Its totient is φ = 85822225920.

The previous prime is 257499997597. The next prime is 257499997723. The reversal of 257499997632 is 236799994752.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 5267382 + ... + 5316042.

Almost surely, 2^257499997632 is an apocalyptic number.

It is an amenable number.

257499997632 is an abundant number, since it is smaller than the sum of its proper divisors (480672761224).

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

257499997632 is a wasteful number, since it uses less digits than its factorization.

257499997632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57866 (or 57853 counting only the distinct ones).

The product of its digits is 462944160, while the sum is 72.

The spelling of 257499997632 in words is "two hundred fifty-seven billion, four hundred ninety-nine million, nine hundred ninety-seven thousand, six hundred thirty-two".