320725644900 has 144 divisors (see below), whose sum is σ = 977576597760. Its totient is φ = 80961552000.

The previous prime is 320725644871. The next prime is 320725644907. The reversal of 320725644900 is 9446527023.

It is not an unprimeable number, because it can be changed into a prime (320725644907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7428375 + ... + 7471425.

Almost surely, 2^320725644900 is an apocalyptic number.

320725644900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320725644900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488788298880).

320725644900 is an abundant number, since it is smaller than the sum of its proper divisors (656850952860).

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

320725644900 is a wasteful number, since it uses less digits than its factorization.

320725644900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44394 (or 44387 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 320725644900 in words is "three hundred twenty billion, seven hundred twenty-five million, six hundred forty-four thousand, nine hundred".