646596064 has 24 divisors (see below), whose sum is σ = 1316883960. Its totient is φ = 312149376.

The previous prime is 646596017. The next prime is 646596073. The reversal of 646596064 is 460695646.

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, 347454 + ... + 349309.

It is an arithmetic number, because the mean of its divisors is an integer number (54870165).

Almost surely, 2^646596064 is an apocalyptic number.

It is an amenable number.

646596064 is an abundant number, since it is smaller than the sum of its proper divisors (670287896).

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

646596064 is a wasteful number, since it uses less digits than its factorization.

646596064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696802 (or 696794 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 46.

The square root of 646596064 is about 25428.2532628570. The cubic root of 646596064 is about 864.7243439859.

The spelling of 646596064 in words is "six hundred forty-six million, five hundred ninety-six thousand, sixty-four".