657864534 has 16 divisors (see below), whose sum is σ = 1317862080. Its totient is φ = 218932680.

The previous prime is 657864533. The next prime is 657864541. The reversal of 657864534 is 435468756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657864533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84852 + ... + 92279.

It is an arithmetic number, because the mean of its divisors is an integer number (82366380).

Almost surely, 2^657864534 is an apocalyptic number.

657864534 is an abundant number, since it is smaller than the sum of its proper divisors (659997546).

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

657864534 is a wasteful number, since it uses less digits than its factorization.

657864534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177755.

The product of its digits is 2419200, while the sum is 48.

The square root of 657864534 is about 25648.8700335902. The cubic root of 657864534 is about 869.7187332288.

The spelling of 657864534 in words is "six hundred fifty-seven million, eight hundred sixty-four thousand, five hundred thirty-four".