27777686102069 has 2 divisors, whose sum is σ = 27777686102070. Its totient is φ = 27777686102068.

The previous prime is 27777686102063. The next prime is 27777686102113. The reversal of 27777686102069 is 96020168677772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27777516711844 + 169390225 = 5270438^2 + 13015^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777686102069 - 2²⁸ = 27777417666613 is a prime.

It is a super-2 number, since 2×27777686102069² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27777686102063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888843051034 + 13888843051035.

It is an arithmetic number, because the mean of its divisors is an integer number (13888843051035).

Almost surely, 2^{27777686102069} is an apocalyptic number.

It is an amenable number.

27777686102069 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777686102069 is an equidigital number, since it uses as much as digits as its factorization.

27777686102069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 27777686102069 in words is "twenty-seven trillion, seven hundred seventy-seven billion, six hundred eighty-six million, one hundred two thousand, sixty-nine".