27804317609 has 2 divisors, whose sum is σ = 27804317610. Its totient is φ = 27804317608.

The previous prime is 27804317549. The next prime is 27804317633. The reversal of 27804317609 is 90671340872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24728506009 + 3075811600 = 157253^2 + 55460^2 .

It is a cyclic number.

It is not a de Polignac number, because 27804317609 - 2²⁴ = 27787540393 is a prime.

It is not a weakly prime, because it can be changed into another prime (27804317659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902158804 + 13902158805.

It is an arithmetic number, because the mean of its divisors is an integer number (13902158805).

Almost surely, 2^27804317609 is an apocalyptic number.

It is an amenable number.

27804317609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27804317609 is an equidigital number, since it uses as much as digits as its factorization.

27804317609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 27804317609 in words is "twenty-seven billion, eight hundred four million, three hundred seventeen thousand, six hundred nine".