64231657 has 16 divisors (see below), whose sum is σ = 75750912. Its totient is φ = 53323200.

The previous prime is 64231649. The next prime is 64231679. The reversal of 64231657 is 75613246.

It is a happy number.

64231657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64231657 - 2³ = 64231649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64231697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32263 + ... + 34195.

It is an arithmetic number, because the mean of its divisors is an integer number (4734432).

Almost surely, 2^64231657 is an apocalyptic number.

It is an amenable number.

64231657 is a deficient number, since it is larger than the sum of its proper divisors (11519255).

64231657 is a wasteful number, since it uses less digits than its factorization.

64231657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its digits is 30240, while the sum is 34.

The square root of 64231657 is about 8014.4654843601. The cubic root of 64231657 is about 400.4820376160.

The spelling of 64231657 in words is "sixty-four million, two hundred thirty-one thousand, six hundred fifty-seven".