27659369161 has 2 divisors, whose sum is σ = 27659369162. Its totient is φ = 27659369160.

The previous prime is 27659369147. The next prime is 27659369167. The reversal of 27659369161 is 16196395672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18480771136 + 9178598025 = 135944^2 + 95805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27659369161 is a prime.

It is not a weakly prime, because it can be changed into another prime (27659369167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13829684580 + 13829684581.

It is an arithmetic number, because the mean of its divisors is an integer number (13829684581).

Almost surely, 2^27659369161 is an apocalyptic number.

It is an amenable number.

27659369161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27659369161 is an equidigital number, since it uses as much as digits as its factorization.

27659369161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The spelling of 27659369161 in words is "twenty-seven billion, six hundred fifty-nine million, three hundred sixty-nine thousand, one hundred sixty-one".