27977694188 has 12 divisors (see below), whose sum is σ = 49135205112. Its totient is φ = 13939064160.

The previous prime is 27977694181. The next prime is 27977694209. The reversal of 27977694188 is 88149677972.

It is not an unprimeable number, because it can be changed into a prime (27977694181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12444470 + ... + 12446717.

It is an arithmetic number, because the mean of its divisors is an integer number (4094600426).

Almost surely, 2^27977694188 is an apocalyptic number.

It is an amenable number.

27977694188 is a deficient number, since it is larger than the sum of its proper divisors (21157510924).

27977694188 is a wasteful number, since it uses less digits than its factorization.

27977694188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891472 (or 24891470 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 68.

The spelling of 27977694188 in words is "twenty-seven billion, nine hundred seventy-seven million, six hundred ninety-four thousand, one hundred eighty-eight".