64646004 has 12 divisors (see below), whose sum is σ = 150840704. Its totient is φ = 21548664.

The previous prime is 64645979. The next prime is 64646027. The reversal of 64646004 is 40064646.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2693572 + ... + 2693595.

Almost surely, 2^64646004 is an apocalyptic number.

It is an amenable number.

64646004 is an abundant number, since it is smaller than the sum of its proper divisors (86194700).

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

64646004 is a wasteful number, since it uses less digits than its factorization.

64646004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387174 (or 5387172 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 64646004 is about 8040.2738759323. The cubic root of 64646004 is about 401.3413386654.

The spelling of 64646004 in words is "sixty-four million, six hundred forty-six thousand, four".