27657112687 has 2 divisors, whose sum is σ = 27657112688. Its totient is φ = 27657112686.

The previous prime is 27657112601. The next prime is 27657112697. The reversal of 27657112687 is 78621175672.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27657112687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27657112697) by changing a digit.

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 as a sum of consecutive naturals, namely, 13828556343 + 13828556344.

It is an arithmetic number, because the mean of its divisors is an integer number (13828556344).

Almost surely, 2^27657112687 is an apocalyptic number.

27657112687 is a deficient number, since it is larger than the sum of its proper divisors (1).

27657112687 is an equidigital number, since it uses as much as digits as its factorization.

27657112687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 52.

The spelling of 27657112687 in words is "twenty-seven billion, six hundred fifty-seven million, one hundred twelve thousand, six hundred eighty-seven".