320445320000 has 280 divisors, whose sum is σ = 864681319656. Its totient is φ = 117080064000.

The previous prime is 320445319993. The next prime is 320445320093. The reversal of 320445320000 is 23544023.

It can be written as a sum of positive squares in 20 ways, for example, as 314864632384 + 5580687616 = 561128^2 + 74704^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50436824 + ... + 50443176.

Almost surely, 2^320445320000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320445320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432340659828).

320445320000 is an abundant number, since it is smaller than the sum of its proper divisors (544235999656).

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

320445320000 is an equidigital number, since it uses as much as digits as its factorization.

320445320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6495 (or 6470 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

Adding to 320445320000 its reverse (23544023), we get a palindrome (320468864023).

The spelling of 320445320000 in words is "three hundred twenty billion, four hundred forty-five million, three hundred twenty thousand".