27779692164 has 24 divisors (see below), whose sum is σ = 74079179328. Its totient is φ = 7937054880.

The previous prime is 27779692133. The next prime is 27779692211. The reversal of 27779692164 is 46129697772.

It is a super-2 number, since 2×27779692164² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27779692098 and 27779692107.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 165355227 + ... + 165355394.

It is an arithmetic number, because the mean of its divisors is an integer number (3086632472).

Almost surely, 2^27779692164 is an apocalyptic number.

It is an amenable number.

27779692164 is an abundant number, since it is smaller than the sum of its proper divisors (46299487164).

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

27779692164 is a wasteful number, since it uses less digits than its factorization.

27779692164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330710635 (or 330710633 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 60.

The spelling of 27779692164 in words is "twenty-seven billion, seven hundred seventy-nine million, six hundred ninety-two thousand, one hundred sixty-four".