27750765631 has 2 divisors, whose sum is σ = 27750765632. Its totient is φ = 27750765630.

The previous prime is 27750765617. The next prime is 27750765673. The reversal of 27750765631 is 13656705772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27750765631 - 2⁷ = 27750765503 is a prime.

It is a super-2 number, since 2×27750765631² (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 (27750765331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875382815 + 13875382816.

It is an arithmetic number, because the mean of its divisors is an integer number (13875382816).

Almost surely, 2^27750765631 is an apocalyptic number.

27750765631 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750765631 is an equidigital number, since it uses as much as digits as its factorization.

27750765631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 27750765631 in words is "twenty-seven billion, seven hundred fifty million, seven hundred sixty-five thousand, six hundred thirty-one".