646642026604 has 12 divisors (see below), whose sum is σ = 1293284053264. Its totient is φ = 277132297104.

The previous prime is 646642026571. The next prime is 646642026617. The reversal of 646642026604 is 406620246646.

It is a happy number.

646642026604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

646642026604 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11547179019 + ... + 11547179074.

Almost surely, 2^646642026604 is an apocalyptic number.

It is an amenable number.

646642026604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646642026604 is a wasteful number, since it uses less digits than its factorization.

646642026604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23094358104 (or 23094358102 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 646642026604 in words is "six hundred forty-six billion, six hundred forty-two million, twenty-six thousand, six hundred four".