64564564 has 6 divisors (see below), whose sum is σ = 112987994. Its totient is φ = 32282280.

The previous prime is 64564517. The next prime is 64564579. The reversal of 64564564 is 46546546.

It can be written as a sum of positive squares in only one way, i.e., 59907600 + 4656964 = 7740^2 + 2158^2 .

It is a congruent number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8070567 + ... + 8070574.

Almost surely, 2^64564564 is an apocalyptic number.

It is an amenable number.

64564564 is a deficient number, since it is larger than the sum of its proper divisors (48423430).

64564564 is a wasteful number, since it uses less digits than its factorization.

64564564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16141145 (or 16141143 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 64564564 is about 8035.2077757828. The cubic root of 64564564 is about 401.1727333809.

The spelling of 64564564 in words is "sixty-four million, five hundred sixty-four thousand, five hundred sixty-four".