646480264 has 16 divisors (see below), whose sum is σ = 1212512400. Its totient is φ = 323143632.

The previous prime is 646480259. The next prime is 646480279. The reversal of 646480264 is 462084646.

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, 22099 + ... + 42205.

It is an arithmetic number, because the mean of its divisors is an integer number (75782025).

Almost surely, 2^646480264 is an apocalyptic number.

It is an amenable number.

646480264 is a deficient number, since it is larger than the sum of its proper divisors (566032136).

646480264 is a wasteful number, since it uses less digits than its factorization.

646480264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24132 (or 24128 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 646480264 is about 25425.9761661180. The cubic root of 646480264 is about 864.6727192478.

The spelling of 646480264 in words is "six hundred forty-six million, four hundred eighty thousand, two hundred sixty-four".