646172416204 has 24 divisors (see below), whose sum is σ = 1292555280128. Its totient is φ = 276885939600.

The previous prime is 646172416177. The next prime is 646172416229. The reversal of 646172416204 is 402614271646.

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, 1703694 + ... + 2048149.

Almost surely, 2^646172416204 is an apocalyptic number.

It is an amenable number.

646172416204 is an abundant number, since it is smaller than the sum of its proper divisors (646382863924).

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

646172416204 is a wasteful number, since it uses less digits than its factorization.

646172416204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758005 (or 3758003 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 646172416204 in words is "six hundred forty-six billion, one hundred seventy-two million, four hundred sixteen thousand, two hundred four".