328348426561 has 4 divisors (see below), whose sum is σ = 328484616624. Its totient is φ = 328212236500.

The previous prime is 328348426529. The next prime is 328348426583. The reversal of 328348426561 is 165624843823.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165624843823 = 751 ⋅220539073.

It is a cyclic number.

It is not a de Polignac number, because 328348426561 - 2⁵ = 328348426529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 328348426499 and 328348426508.

It is not an unprimeable number, because it can be changed into a prime (328348424561) 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, 68091415 + ... + 68096236.

It is an arithmetic number, because the mean of its divisors is an integer number (82121154156).

Almost surely, 2^328348426561 is an apocalyptic number.

It is an amenable number.

328348426561 is a deficient number, since it is larger than the sum of its proper divisors (136190063).

328348426561 is a wasteful number, since it uses less digits than its factorization.

328348426561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136190062.

The product of its digits is 6635520, while the sum is 52.

The spelling of 328348426561 in words is "three hundred twenty-eight billion, three hundred forty-eight million, four hundred twenty-six thousand, five hundred sixty-one".