27549375697 has 2 divisors, whose sum is σ = 27549375698. Its totient is φ = 27549375696.

The previous prime is 27549375661. The next prime is 27549375703. The reversal of 27549375697 is 79657394572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23700910401 + 3848465296 = 153951^2 + 62036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27549375697 is a prime.

It is not a weakly prime, because it can be changed into another prime (27549375397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13774687848 + 13774687849.

It is an arithmetic number, because the mean of its divisors is an integer number (13774687849).

Almost surely, 2^27549375697 is an apocalyptic number.

It is an amenable number.

27549375697 is a deficient number, since it is larger than the sum of its proper divisors (1).

27549375697 is an equidigital number, since it uses as much as digits as its factorization.

27549375697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100018800, while the sum is 64.

The spelling of 27549375697 in words is "twenty-seven billion, five hundred forty-nine million, three hundred seventy-five thousand, six hundred ninety-seven".