326616161 has 2 divisors, whose sum is σ = 326616162. Its totient is φ = 326616160.

The previous prime is 326616149. The next prime is 326616163. The reversal of 326616161 is 161616623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325585936 + 1030225 = 18044^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 326616161 - 2⁶ = 326616097 is a prime.

Together with 326616163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (326616163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163308080 + 163308081.

It is an arithmetic number, because the mean of its divisors is an integer number (163308081).

Almost surely, 2^326616161 is an apocalyptic number.

It is an amenable number.

326616161 is a deficient number, since it is larger than the sum of its proper divisors (1).

326616161 is an equidigital number, since it uses as much as digits as its factorization.

326616161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 326616161 is about 18072.5250311073. The cubic root of 326616161 is about 688.6722074231.

The spelling of 326616161 in words is "three hundred twenty-six million, six hundred sixteen thousand, one hundred sixty-one".