328320978049 has 3 divisors (see below), whose sum is σ = 328321551043. Its totient is φ = 328320405056.

The previous prime is 328320978043. The next prime is 328320978061. The reversal of 328320978049 is 940879023823.

The square root of 328320978049 is 572993.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 194388401025 + 133932577024 = 440895^2 + 365968^2 .

It is not a de Polignac number, because 328320978049 - 2³⁷ = 190882024577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (328320978043) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 286497 + ... + 859489.

Almost surely, 2^328320978049 is an apocalyptic number.

328320978049 is the 572993-rd square number.

328320978049 is the 286497-th centered octagonal number.

It is an amenable number.

328320978049 is a deficient number, since it is larger than the sum of its proper divisors (572994).

328320978049 is an frugal number, since it uses more digits than its factorization.

328320978049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145986 (or 572993 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 328320978049 in words is "three hundred twenty-eight billion, three hundred twenty million, nine hundred seventy-eight thousand, forty-nine".