27211757161 has 2 divisors, whose sum is σ = 27211757162. Its totient is φ = 27211757160.

The previous prime is 27211757129. The next prime is 27211757219. The reversal of 27211757161 is 16175711272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15792697561 + 11419059600 = 125669^2 + 106860^2 .

It is a cyclic number.

It is not a de Polignac number, because 27211757161 - 2⁵ = 27211757129 is a prime.

It is not a weakly prime, because it can be changed into another prime (27211757101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13605878580 + 13605878581.

It is an arithmetic number, because the mean of its divisors is an integer number (13605878581).

Almost surely, 2^27211757161 is an apocalyptic number.

It is an amenable number.

27211757161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27211757161 is an equidigital number, since it uses as much as digits as its factorization.

27211757161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 40.

The spelling of 27211757161 in words is "twenty-seven billion, two hundred eleven million, seven hundred fifty-seven thousand, one hundred sixty-one".