27919562431 has 2 divisors, whose sum is σ = 27919562432. Its totient is φ = 27919562430.

The previous prime is 27919562413. The next prime is 27919562443. The reversal of 27919562431 is 13426591972.

Together with previous prime (27919562413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27919562431 - 2²⁷ = 27785344703 is a prime.

It is a super-2 number, since 2×27919562431² (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 (27919562401) 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 as a sum of consecutive naturals, namely, 13959781215 + 13959781216.

It is an arithmetic number, because the mean of its divisors is an integer number (13959781216).

Almost surely, 2^27919562431 is an apocalyptic number.

27919562431 is a deficient number, since it is larger than the sum of its proper divisors (1).

27919562431 is an equidigital number, since it uses as much as digits as its factorization.

27919562431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The spelling of 27919562431 in words is "twenty-seven billion, nine hundred nineteen million, five hundred sixty-two thousand, four hundred thirty-one".