27776515049 has 2 divisors, whose sum is σ = 27776515050. Its totient is φ = 27776515048.

The previous prime is 27776514967. The next prime is 27776515097. The reversal of 27776515049 is 94051567772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26562480400 + 1214034649 = 162980^2 + 34843^2 .

It is a cyclic number.

It is not a de Polignac number, because 27776515049 - 2⁸ = 27776514793 is a prime.

It is not a weakly prime, because it can be changed into another prime (27776505049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13888257524 + 13888257525.

It is an arithmetic number, because the mean of its divisors is an integer number (13888257525).

Almost surely, 2^27776515049 is an apocalyptic number.

It is an amenable number.

27776515049 is a deficient number, since it is larger than the sum of its proper divisors (1).

27776515049 is an equidigital number, since it uses as much as digits as its factorization.

27776515049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 27776515049 in words is "twenty-seven billion, seven hundred seventy-six million, five hundred fifteen thousand, forty-nine".