27149568613 has 2 divisors, whose sum is σ = 27149568614. Its totient is φ = 27149568612.

The previous prime is 27149568557. The next prime is 27149568617. The reversal of 27149568613 is 31686594172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23318206209 + 3831362404 = 152703^2 + 61898^2 .

It is a cyclic number.

It is not a de Polignac number, because 27149568613 - 2¹⁷ = 27149437541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27149568617) 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, 13574784306 + 13574784307.

It is an arithmetic number, because the mean of its divisors is an integer number (13574784307).

Almost surely, 2^27149568613 is an apocalyptic number.

It is an amenable number.

27149568613 is a deficient number, since it is larger than the sum of its proper divisors (1).

27149568613 is an equidigital number, since it uses as much as digits as its factorization.

27149568613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The spelling of 27149568613 in words is "twenty-seven billion, one hundred forty-nine million, five hundred sixty-eight thousand, six hundred thirteen".