646592016 has 80 divisors (see below), whose sum is σ = 1911845888. Its totient is φ = 184464000.

The previous prime is 646591969. The next prime is 646592053. The reversal of 646592016 is 610295646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352221 + ... + 354051.

Almost surely, 2^646592016 is an apocalyptic number.

It is an amenable number.

646592016 is an abundant number, since it is smaller than the sum of its proper divisors (1265253872).

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

646592016 is a wasteful number, since it uses less digits than its factorization.

646592016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2894 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 646592016 is about 25428.1736662309. The cubic root of 646592016 is about 864.7225394531.

The spelling of 646592016 in words is "six hundred forty-six million, five hundred ninety-two thousand, sixteen".