64645564 has 12 divisors (see below), whose sum is σ = 113944600. Its totient is φ = 32089968.

The previous prime is 64645517. The next prime is 64645573. The reversal of 64645564 is 46554646.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57579 + ... + 58690.

Almost surely, 2^64645564 is an apocalyptic number.

It is an amenable number.

64645564 is a deficient number, since it is larger than the sum of its proper divisors (49299036).

64645564 is a wasteful number, since it uses less digits than its factorization.

64645564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116412 (or 116410 counting only the distinct ones).

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

The square root of 64645564 is about 8040.2465136338. The cubic root of 64645564 is about 401.3404281137.

The spelling of 64645564 in words is "sixty-four million, six hundred forty-five thousand, five hundred sixty-four".