12642645222 has 24 divisors (see below), whose sum is σ = 27395213976. Its totient is φ = 4213781856.

The previous prime is 12642645209. The next prime is 12642645247. The reversal of 12642645222 is 22254624621.

12642645222 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 2 + 645 + 2 + 2 + 2 = 666.

12642645222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178258 + ... + 238874.

It is an arithmetic number, because the mean of its divisors is an integer number (1141467249).

Almost surely, 2^12642645222 is an apocalyptic number.

12642645222 is an abundant number, since it is smaller than the sum of its proper divisors (14752568754).

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

12642645222 is a wasteful number, since it uses less digits than its factorization.

12642645222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72212 (or 72209 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The spelling of 12642645222 in words is "twelve billion, six hundred forty-two million, six hundred forty-five thousand, two hundred twenty-two".