646416550432 has 12 divisors (see below), whose sum is σ = 1272632583726. Its totient is φ = 323208275200.

The previous prime is 646416550399. The next prime is 646416550441. The reversal of 646416550432 is 234055614646.

It can be written as a sum of positive squares in only one way, i.e., 578506275216 + 67910275216 = 760596^2 + 260596^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100258569 + ... + 10100258632.

Almost surely, 2^646416550432 is an apocalyptic number.

It is an amenable number.

646416550432 is a deficient number, since it is larger than the sum of its proper divisors (626216033294).

646416550432 is a wasteful number, since it uses less digits than its factorization.

646416550432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200517211 (or 20200517203 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 646416550432 in words is "six hundred forty-six billion, four hundred sixteen million, five hundred fifty thousand, four hundred thirty-two".