646400002204 has 24 divisors (see below), whose sum is σ = 1235539526256. Its totient is φ = 293460288000.

The previous prime is 646400002177. The next prime is 646400002207. The reversal of 646400002204 is 402200004646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646400002207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8910837 + ... + 8983084.

It is an arithmetic number, because the mean of its divisors is an integer number (51480813594).

Almost surely, 2^646400002204 is an apocalyptic number.

It is an amenable number.

646400002204 is a deficient number, since it is larger than the sum of its proper divisors (589139524052).

646400002204 is a wasteful number, since it uses less digits than its factorization.

646400002204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17894757 (or 17894755 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 646400002204 in words is "six hundred forty-six billion, four hundred million, two thousand, two hundred four".