646322305046164 has 6 divisors (see below), whose sum is σ = 1131064033830794. Its totient is φ = 323161152523080.

The previous prime is 646322305046123. The next prime is 646322305046179. The reversal of 646322305046164 is 461640503223646.

646322305046164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 617787926515600 + 28534378530564 = 24855340^2 + 5341758^2 .

It is a super-2 number, since 2×646322305046164² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80790288130767 + ... + 80790288130774.

Almost surely, 2^{646322305046164} is an apocalyptic number.

It is an amenable number.

646322305046164 is a deficient number, since it is larger than the sum of its proper divisors (484741728784630).

646322305046164 is a wasteful number, since it uses less digits than its factorization.

646322305046164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161580576261545 (or 161580576261543 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 52.

The spelling of 646322305046164 in words is "six hundred forty-six trillion, three hundred twenty-two billion, three hundred five million, forty-six thousand, one hundred sixty-four".