27688195831 has 2 divisors, whose sum is σ = 27688195832. Its totient is φ = 27688195830.

The previous prime is 27688195807. The next prime is 27688195859. The reversal of 27688195831 is 13859188672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27688195831 - 2²³ = 27679807223 is a prime.

It is a super-2 number, since 2×27688195831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27688195861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13844097915 + 13844097916.

It is an arithmetic number, because the mean of its divisors is an integer number (13844097916).

Almost surely, 2^27688195831 is an apocalyptic number.

27688195831 is a deficient number, since it is larger than the sum of its proper divisors (1).

27688195831 is an equidigital number, since it uses as much as digits as its factorization.

27688195831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 58.

The spelling of 27688195831 in words is "twenty-seven billion, six hundred eighty-eight million, one hundred ninety-five thousand, eight hundred thirty-one".