27777212164 has 36 divisors (see below), whose sum is σ = 52895540964. Its totient is φ = 12687860736.

The previous prime is 27777212161. The next prime is 27777212189. The reversal of 27777212164 is 46121277772.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3665333764 + 24111878400 = 60542^2 + 155280^2 .

It is not an unprimeable number, because it can be changed into a prime (27777212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460882 + ... + 517654.

Almost surely, 2^27777212164 is an apocalyptic number.

It is an amenable number.

27777212164 is a deficient number, since it is larger than the sum of its proper divisors (25118328800).

27777212164 is a wasteful number, since it uses less digits than its factorization.

27777212164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56984 (or 56885 counting only the distinct ones).

The product of its digits is 460992, while the sum is 46.

The spelling of 27777212164 in words is "twenty-seven billion, seven hundred seventy-seven million, two hundred twelve thousand, one hundred sixty-four".