27808966631 has 2 divisors, whose sum is σ = 27808966632. Its totient is φ = 27808966630.

The previous prime is 27808966553. The next prime is 27808966663. The reversal of 27808966631 is 13666980872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27808966631 - 2¹⁰ = 27808965607 is a prime.

It is a super-2 number, since 2×27808966631² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27808966831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13904483315 + 13904483316.

It is an arithmetic number, because the mean of its divisors is an integer number (13904483316).

Almost surely, 2^27808966631 is an apocalyptic number.

27808966631 is a deficient number, since it is larger than the sum of its proper divisors (1).

27808966631 is an equidigital number, since it uses as much as digits as its factorization.

27808966631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 27808966631 in words is "twenty-seven billion, eight hundred eight million, nine hundred sixty-six thousand, six hundred thirty-one".