27777613009 has 2 divisors, whose sum is σ = 27777613010. Its totient is φ = 27777613008.

The previous prime is 27777612997. The next prime is 27777613033. The reversal of 27777613009 is 90031677772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25751262784 + 2026350225 = 160472^2 + 45015^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777613009 - 2⁵ = 27777612977 is a prime.

It is not a weakly prime, because it can be changed into another prime (27777613049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888806504 + 13888806505.

It is an arithmetic number, because the mean of its divisors is an integer number (13888806505).

Almost surely, 2^27777613009 is an apocalyptic number.

It is an amenable number.

27777613009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27777613009 is an equidigital number, since it uses as much as digits as its factorization.

27777613009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777924, while the sum is 49.

The spelling of 27777613009 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred thirteen thousand, nine".