27777116173 has 2 divisors, whose sum is σ = 27777116174. Its totient is φ = 27777116172.

The previous prime is 27777116113. The next prime is 27777116209. The reversal of 27777116173 is 37161177772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26947848964 + 829267209 = 164158^2 + 28797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27777116173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27777116113) 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, 13888558086 + 13888558087.

It is an arithmetic number, because the mean of its divisors is an integer number (13888558087).

Almost surely, 2^27777116173 is an apocalyptic number.

It is an amenable number.

27777116173 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777116173 is an equidigital number, since it uses as much as digits as its factorization.

27777116173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 605052, while the sum is 49.

The spelling of 27777116173 in words is "twenty-seven billion, seven hundred seventy-seven million, one hundred sixteen thousand, one hundred seventy-three".