64517656 has 32 divisors (see below), whose sum is σ = 138528000. Its totient is φ = 27595296.

The previous prime is 64517653. The next prime is 64517701. The reversal of 64517656 is 65671546.

64517656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64517653) 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 7 ways as a sum of consecutive naturals, for example, 40605 + ... + 42163.

It is an arithmetic number, because the mean of its divisors is an integer number (4329000).

Almost surely, 2^64517656 is an apocalyptic number.

It is an amenable number.

64517656 is an abundant number, since it is smaller than the sum of its proper divisors (74010344).

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

64517656 is a wasteful number, since it uses less digits than its factorization.

64517656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311 (or 2307 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 64517656 is about 8032.2883414379. The cubic root of 64517656 is about 401.0755553595.

The spelling of 64517656 in words is "sixty-four million, five hundred seventeen thousand, six hundred fifty-six".