320643228800 has 96 divisors (see below), whose sum is σ = 838682587620. Its totient is φ = 120712724480.

The previous prime is 320643228707. The next prime is 320643228839. The reversal of 320643228800 is 8822346023.

It can be written as a sum of positive squares in 6 ways, for example, as 250824678976 + 69818549824 = 500824^2 + 264232^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2892689 + ... + 3001488.

Almost surely, 2^320643228800 is an apocalyptic number.

It is an amenable number.

320643228800 is an abundant number, since it is smaller than the sum of its proper divisors (518039358820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320643228800 is a wasteful number, since it uses less digits than its factorization.

320643228800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894218 (or 5894201 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 320643228800 in words is "three hundred twenty billion, six hundred forty-three million, two hundred twenty-eight thousand, eight hundred".