328438859641 has 4 divisors (see below), whose sum is σ = 328695654400. Its totient is φ = 328182064884.

The previous prime is 328438859587. The next prime is 328438859659. The reversal of 328438859641 is 146958834823.

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: 146958834823 = 19 ⋅7734675517.

It is a cyclic number.

It is not a de Polignac number, because 328438859641 - 2⁷ = 328438859513 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 328438859641.

It is not an unprimeable number, because it can be changed into a prime (328438859681) 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, 128395461 + ... + 128398018.

It is an arithmetic number, because the mean of its divisors is an integer number (82173913600).

Almost surely, 2^328438859641 is an apocalyptic number.

It is an amenable number.

328438859641 is a deficient number, since it is larger than the sum of its proper divisors (256794759).

328438859641 is a wasteful number, since it uses less digits than its factorization.

328438859641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256794758.

The product of its digits is 39813120, while the sum is 61.

The spelling of 328438859641 in words is "three hundred twenty-eight billion, four hundred thirty-eight million, eight hundred fifty-nine thousand, six hundred forty-one".