326522431621 has 4 divisors (see below), whose sum is σ = 326777728000. Its totient is φ = 326267135244.

The previous prime is 326522431619. The next prime is 326522431639. The reversal of 326522431621 is 126134225623.

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 326522431621 - 2¹ = 326522431619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326522431681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127646271 + ... + 127648828.

It is an arithmetic number, because the mean of its divisors is an integer number (81694432000).

Almost surely, 2^326522431621 is an apocalyptic number.

It is an amenable number.

326522431621 is a deficient number, since it is larger than the sum of its proper divisors (255296379).

326522431621 is a wasteful number, since it uses less digits than its factorization.

326522431621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255296378.

The product of its digits is 103680, while the sum is 37.

The spelling of 326522431621 in words is "three hundred twenty-six billion, five hundred twenty-two million, four hundred thirty-one thousand, six hundred twenty-one".