27739985137 has 2 divisors, whose sum is σ = 27739985138. Its totient is φ = 27739985136.

The previous prime is 27739985129. The next prime is 27739985159. The reversal of 27739985137 is 73158993772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26210314816 + 1529670321 = 161896^2 + 39111^2 .

It is a cyclic number.

It is not a de Polignac number, because 27739985137 - 2³ = 27739985129 is a prime.

It is not a weakly prime, because it can be changed into another prime (27739985837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13869992568 + 13869992569.

It is an arithmetic number, because the mean of its divisors is an integer number (13869992569).

Almost surely, 2^27739985137 is an apocalyptic number.

It is an amenable number.

27739985137 is a deficient number, since it is larger than the sum of its proper divisors (1).

27739985137 is an equidigital number, since it uses as much as digits as its factorization.

27739985137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 61.

The spelling of 27739985137 in words is "twenty-seven billion, seven hundred thirty-nine million, nine hundred eighty-five thousand, one hundred thirty-seven".