646604122722 has 16 divisors (see below), whose sum is σ = 1320723315072. Its totient is φ = 210948862640.

The previous prime is 646604122691. The next prime is 646604122753. The reversal of 646604122722 is 227221406646.

646604122722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (646604122691) and next prime (646604122753).

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, 1146460929 + ... + 1146461492.

It is an arithmetic number, because the mean of its divisors is an integer number (82545207192).

Almost surely, 2^646604122722 is an apocalyptic number.

646604122722 is an abundant number, since it is smaller than the sum of its proper divisors (674119192350).

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

646604122722 is a wasteful number, since it uses less digits than its factorization.

646604122722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292922473.

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 646604122722 in words is "six hundred forty-six billion, six hundred four million, one hundred twenty-two thousand, seven hundred twenty-two".