27129411887 has 2 divisors, whose sum is σ = 27129411888. Its totient is φ = 27129411886.

The previous prime is 27129411871. The next prime is 27129411929. The reversal of 27129411887 is 78811492172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27129411887 - 2⁴ = 27129411871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27129411817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13564705943 + 13564705944.

It is an arithmetic number, because the mean of its divisors is an integer number (13564705944).

Almost surely, 2^27129411887 is an apocalyptic number.

27129411887 is a deficient number, since it is larger than the sum of its proper divisors (1).

27129411887 is an equidigital number, since it uses as much as digits as its factorization.

27129411887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 50.

The spelling of 27129411887 in words is "twenty-seven billion, one hundred twenty-nine million, four hundred eleven thousand, eight hundred eighty-seven".