64573656 has 32 divisors (see below), whose sum is σ = 184496640. Its totient is φ = 18449568.

The previous prime is 64573637. The next prime is 64573661. The reversal of 64573656 is 65637546.

64573656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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, 192016 + ... + 192351.

It is an arithmetic number, because the mean of its divisors is an integer number (5765520).

Almost surely, 2^64573656 is an apocalyptic number.

It is an amenable number.

64573656 is an abundant number, since it is smaller than the sum of its proper divisors (119922984).

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

64573656 is a wasteful number, since it uses less digits than its factorization.

64573656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384383 (or 384379 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 64573656 is about 8035.7735159722. The cubic root of 64573656 is about 401.1915635826.

The spelling of 64573656 in words is "sixty-four million, five hundred seventy-three thousand, six hundred fifty-six".