64328564 has 6 divisors (see below), whose sum is σ = 112574994. Its totient is φ = 32164280.

The previous prime is 64328543. The next prime is 64328573. The reversal of 64328564 is 46582346.

It can be written as a sum of positive squares in only one way, i.e., 62283664 + 2044900 = 7892^2 + 1430^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8041067 + ... + 8041074.

It is an arithmetic number, because the mean of its divisors is an integer number (18762499).

Almost surely, 2^64328564 is an apocalyptic number.

It is an amenable number.

64328564 is a deficient number, since it is larger than the sum of its proper divisors (48246430).

64328564 is a wasteful number, since it uses less digits than its factorization.

64328564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16082145 (or 16082143 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 64328564 is about 8020.5089614064. The cubic root of 64328564 is about 400.6833402837.

The spelling of 64328564 in words is "sixty-four million, three hundred twenty-eight thousand, five hundred sixty-four".