326640511 has 2 divisors, whose sum is σ = 326640512. Its totient is φ = 326640510.

The previous prime is 326640497. The next prime is 326640529. The reversal of 326640511 is 115046623.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 326640511 - 2¹⁷ = 326509439 is a prime.

It is a super-2 number, since 2×326640511² = 213388046852682242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 326640511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326640011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163320255 + 163320256.

It is an arithmetic number, because the mean of its divisors is an integer number (163320256).

Almost surely, 2^326640511 is an apocalyptic number.

326640511 is a deficient number, since it is larger than the sum of its proper divisors (1).

326640511 is an equidigital number, since it uses as much as digits as its factorization.

326640511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 326640511 is about 18073.1986930925. The cubic root of 326640511 is about 688.6893210400.

The spelling of 326640511 in words is "three hundred twenty-six million, six hundred forty thousand, five hundred eleven".