27722732164 has 24 divisors (see below), whose sum is σ = 48735751680. Its totient is φ = 13798311744.

The previous prime is 27722732153. The next prime is 27722732179. The reversal of 27722732164 is 46123722772.

It is a self number, because there is not a number n which added to its sum of digits gives 27722732164.

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, 1504672 + ... + 1522984.

It is an arithmetic number, because the mean of its divisors is an integer number (2030656320).

Almost surely, 2^27722732164 is an apocalyptic number.

It is an amenable number.

27722732164 is a deficient number, since it is larger than the sum of its proper divisors (21013019516).

27722732164 is a wasteful number, since it uses less digits than its factorization.

27722732164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20019 (or 20017 counting only the distinct ones).

The product of its digits is 395136, while the sum is 43.

The spelling of 27722732164 in words is "twenty-seven billion, seven hundred twenty-two million, seven hundred thirty-two thousand, one hundred sixty-four".