326491006813 has 4 divisors (see below), whose sum is σ = 327062795488. Its totient is φ = 325919218140.

The previous prime is 326491006801. The next prime is 326491006843. The reversal of 326491006813 is 318600194623.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 326491006813 - 2¹³ = 326490998621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 326491006813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326491006843) 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 in 3 ways as a sum of consecutive naturals, for example, 285893481 + ... + 285894622.

It is an arithmetic number, because the mean of its divisors is an integer number (81765698872).

Almost surely, 2^326491006813 is an apocalyptic number.

It is an amenable number.

326491006813 is a deficient number, since it is larger than the sum of its proper divisors (571788675).

326491006813 is an equidigital number, since it uses as much as digits as its factorization.

326491006813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571788674.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 326491006813 in words is "three hundred twenty-six billion, four hundred ninety-one million, six thousand, eight hundred thirteen".