27565361279 has 2 divisors, whose sum is σ = 27565361280. Its totient is φ = 27565361278.

The previous prime is 27565361273. The next prime is 27565361339. The reversal of 27565361279 is 97216356572.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27565361279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27565361279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27565361273) 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, 13782680639 + 13782680640.

It is an arithmetic number, because the mean of its divisors is an integer number (13782680640).

Almost surely, 2^27565361279 is an apocalyptic number.

27565361279 is a deficient number, since it is larger than the sum of its proper divisors (1).

27565361279 is an equidigital number, since it uses as much as digits as its factorization.

27565361279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 53.

The spelling of 27565361279 in words is "twenty-seven billion, five hundred sixty-five million, three hundred sixty-one thousand, two hundred seventy-nine".