27688126563 has 20 divisors (see below), whose sum is σ = 42695514048. Its totient is φ = 17863305840.

The previous prime is 27688126537. The next prime is 27688126573. The reversal of 27688126563 is 36562188672.

27688126563 is a `hidden beast` number, since 2 + 7 + 68 + 8 + 12 + 6 + 563 = 666.

It is not a de Polignac number, because 27688126563 - 2⁸ = 27688126307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27688126573) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5510856 + ... + 5515877.

Almost surely, 2^27688126563 is an apocalyptic number.

27688126563 is a deficient number, since it is larger than the sum of its proper divisors (15007387485).

27688126563 is a wasteful number, since it uses less digits than its factorization.

27688126563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026776 (or 11026767 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 27688126563 in words is "twenty-seven billion, six hundred eighty-eight million, one hundred twenty-six thousand, five hundred sixty-three".