27777675413 has 4 divisors (see below), whose sum is σ = 27811510188. Its totient is φ = 27743840640.

The previous prime is 27777675397. The next prime is 27777675451. The reversal of 27777675413 is 31457677772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6093051364 + 21684624049 = 78058^2 + 147257^2 .

It is a cyclic number.

It is not a de Polignac number, because 27777675413 - 2⁴ = 27777675397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777675473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16916156 + ... + 16917797.

It is an arithmetic number, because the mean of its divisors is an integer number (6952877547).

Almost surely, 2^27777675413 is an apocalyptic number.

It is an amenable number.

27777675413 is a deficient number, since it is larger than the sum of its proper divisors (33834775).

27777675413 is an equidigital number, since it uses as much as digits as its factorization.

27777675413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33834774.

The product of its digits is 12101040, while the sum is 56.

The spelling of 27777675413 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-five thousand, four hundred thirteen".