27997760688 has 80 divisors (see below), whose sum is σ = 76163934720. Its totient is φ = 8837952768.

The previous prime is 27997760677. The next prime is 27997760711. The reversal of 27997760688 is 88606779972.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3394906 + ... + 3403142.

It is an arithmetic number, because the mean of its divisors is an integer number (952049184).

Almost surely, 2^27997760688 is an apocalyptic number.

It is an amenable number.

27997760688 is an abundant number, since it is smaller than the sum of its proper divisors (48166174032).

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

27997760688 is a wasteful number, since it uses less digits than its factorization.

27997760688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11994 (or 11988 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 69.

The spelling of 27997760688 in words is "twenty-seven billion, nine hundred ninety-seven million, seven hundred sixty thousand, six hundred eighty-eight".