27767955816 has 32 divisors (see below), whose sum is σ = 77133211200. Its totient is φ = 9255985200.

The previous prime is 27767955773. The next prime is 27767955863. The reversal of 27767955816 is 61855976772.

27767955816 is a `hidden beast` number, since 2 + 7 + 7 + 6 + 79 + 558 + 1 + 6 = 666.

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 7 ways as a sum of consecutive naturals, for example, 64277460 + ... + 64277891.

It is an arithmetic number, because the mean of its divisors is an integer number (2410412850).

Almost surely, 2^27767955816 is an apocalyptic number.

It is an amenable number.

27767955816 is an abundant number, since it is smaller than the sum of its proper divisors (49365255384).

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

27767955816 is a wasteful number, since it uses less digits than its factorization.

27767955816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128555366 (or 128555356 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 63.

The spelling of 27767955816 in words is "twenty-seven billion, seven hundred sixty-seven million, nine hundred fifty-five thousand, eight hundred sixteen".