646564006 has 16 divisors (see below), whose sum is σ = 1058511888. Its totient is φ = 293754400.

The previous prime is 646563991. The next prime is 646564027. The reversal of 646564006 is 600465646.

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, 52056 + ... + 63268.

It is an arithmetic number, because the mean of its divisors is an integer number (66156993).

Almost surely, 2^646564006 is an apocalyptic number.

646564006 is a deficient number, since it is larger than the sum of its proper divisors (411947882).

646564006 is a wasteful number, since it uses less digits than its factorization.

646564006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13847.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 646564006 is about 25427.6228932238. The cubic root of 646564006 is about 864.7100528426.

The spelling of 646564006 in words is "six hundred forty-six million, five hundred sixty-four thousand, six".