326491064197 has 2 divisors, whose sum is σ = 326491064198. Its totient is φ = 326491064196.

The previous prime is 326491064177. The next prime is 326491064201. The reversal of 326491064197 is 791460194623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184417854721 + 142073209476 = 429439^2 + 376926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326491064197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326491064177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163245532098 + 163245532099.

It is an arithmetic number, because the mean of its divisors is an integer number (163245532099).

Almost surely, 2^326491064197 is an apocalyptic number.

It is an amenable number.

326491064197 is a deficient number, since it is larger than the sum of its proper divisors (1).

326491064197 is an equidigital number, since it uses as much as digits as its factorization.

326491064197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 326491064197 in words is "three hundred twenty-six billion, four hundred ninety-one million, sixty-four thousand, one hundred ninety-seven".