646302904772 has 24 divisors (see below), whose sum is σ = 1292641339584. Its totient is φ = 276979345632.

The previous prime is 646302904717. The next prime is 646302904781. The reversal of 646302904772 is 277409203646.

It is a self number, because there is not a number n which added to its sum of digits gives 646302904772.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787058 + ... + 1382774.

It is an arithmetic number, because the mean of its divisors is an integer number (53860055816).

Almost surely, 2^646302904772 is an apocalyptic number.

It is an amenable number.

646302904772 is an abundant number, since it is smaller than the sum of its proper divisors (646338434812).

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

646302904772 is a wasteful number, since it uses less digits than its factorization.

646302904772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634475 (or 634473 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 646302904772 in words is "six hundred forty-six billion, three hundred two million, nine hundred four thousand, seven hundred seventy-two".