657715164 has 12 divisors (see below), whose sum is σ = 1534668744. Its totient is φ = 219238384.

The previous prime is 657715147. The next prime is 657715169. The reversal of 657715164 is 461517756.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657715169) 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, 27404787 + ... + 27404810.

It is an arithmetic number, because the mean of its divisors is an integer number (127889062).

Almost surely, 2^657715164 is an apocalyptic number.

It is an amenable number.

657715164 is an abundant number, since it is smaller than the sum of its proper divisors (876953580).

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

657715164 is a wasteful number, since it uses less digits than its factorization.

657715164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54809604 (or 54809602 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 657715164 is about 25645.9580441051. The cubic root of 657715164 is about 869.6529042149.

The spelling of 657715164 in words is "six hundred fifty-seven million, seven hundred fifteen thousand, one hundred sixty-four".