161156606161171 has 2 divisors, whose sum is σ = 161156606161172. Its totient is φ = 161156606161170.

The previous prime is 161156606161069. The next prime is 161156606161181. The reversal of 161156606161171 is 171161606651161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161156606161171 - 2²⁵ = 161156572606739 is a prime.

It is not a weakly prime, because it can be changed into another prime (161156606161181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80578303080585 + 80578303080586.

It is an arithmetic number, because the mean of its divisors is an integer number (80578303080586).

Almost surely, 2^{161156606161171} is an apocalyptic number.

161156606161171 is a deficient number, since it is larger than the sum of its proper divisors (1).

161156606161171 is an equidigital number, since it uses as much as digits as its factorization.

161156606161171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 161156606161171 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, six hundred six million, one hundred sixty-one thousand, one hundred seventy-one".