257907732432 has 80 divisors (see below), whose sum is σ = 786004549632. Its totient is φ = 71310890880.

The previous prime is 257907732421. The next prime is 257907732473. The reversal of 257907732432 is 234237709752.

It is a super-2 number, since 2×257907732432² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12369948 + ... + 12390779.

Almost surely, 2^257907732432 is an apocalyptic number.

It is an amenable number.

257907732432 is an abundant number, since it is smaller than the sum of its proper divisors (528096817200).

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

257907732432 is a wasteful number, since it uses less digits than its factorization.

257907732432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24760776 (or 24760770 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 51.

The spelling of 257907732432 in words is "two hundred fifty-seven billion, nine hundred seven million, seven hundred thirty-two thousand, four hundred thirty-two".