326438626809 has 4 divisors (see below), whose sum is σ = 435251502416. Its totient is φ = 217625751204.

The previous prime is 326438626757. The next prime is 326438626937. The reversal of 326438626809 is 908626834623.

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 not a de Polignac number, because 326438626809 - 2¹³ = 326438618617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326438626009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54406437799 + ... + 54406437804.

It is an arithmetic number, because the mean of its divisors is an integer number (108812875604).

Almost surely, 2^326438626809 is an apocalyptic number.

It is an amenable number.

326438626809 is a deficient number, since it is larger than the sum of its proper divisors (108812875607).

326438626809 is a wasteful number, since it uses less digits than its factorization.

326438626809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108812875606.

The product of its (nonzero) digits is 17915904, while the sum is 57.

The spelling of 326438626809 in words is "three hundred twenty-six billion, four hundred thirty-eight million, six hundred twenty-six thousand, eight hundred nine".