326611643 has 2 divisors, whose sum is σ = 326611644. Its totient is φ = 326611642.

The previous prime is 326611613. The next prime is 326611651. The reversal of 326611643 is 346116623.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 326611643 - 2²⁰ = 325563067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (326611613) 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, 163305821 + 163305822.

It is an arithmetic number, because the mean of its divisors is an integer number (163305822).

Almost surely, 2^326611643 is an apocalyptic number.

326611643 is a deficient number, since it is larger than the sum of its proper divisors (1).

326611643 is an equidigital number, since it uses as much as digits as its factorization.

326611643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 326611643 is about 18072.4000343065. The cubic root of 326611643 is about 688.6690319981.

The spelling of 326611643 in words is "three hundred twenty-six million, six hundred eleven thousand, six hundred forty-three".