257532732664 has 16 divisors (see below), whose sum is σ = 488691632520. Its totient is φ = 127214964000.

The previous prime is 257532732661. The next prime is 257532732673. The reversal of 257532732664 is 466237235752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257532732661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193924587 + ... + 193925914.

Almost surely, 2^257532732664 is an apocalyptic number.

It is an amenable number.

257532732664 is a deficient number, since it is larger than the sum of its proper divisors (231158899856).

257532732664 is a wasteful number, since it uses less digits than its factorization.

257532732664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387850590 (or 387850586 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 52.

The spelling of 257532732664 in words is "two hundred fifty-seven billion, five hundred thirty-two million, seven hundred thirty-two thousand, six hundred sixty-four".