320405452000 has 48 divisors (see below), whose sum is σ = 787236205392. Its totient is φ = 128162179200.

The previous prime is 320405451967. The next prime is 320405452063. The reversal of 320405452000 is 254504023.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40046682 + ... + 40054681.

It is an arithmetic number, because the mean of its divisors is an integer number (16400754279).

Almost surely, 2^320405452000 is an apocalyptic number.

It is an amenable number.

320405452000 is an abundant number, since it is smaller than the sum of its proper divisors (466830753392).

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

320405452000 is an equidigital number, since it uses as much as digits as its factorization.

320405452000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80101388 (or 80101370 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 320405452000 its reverse (254504023), we get a palindrome (320659956023).

The spelling of 320405452000 in words is "three hundred twenty billion, four hundred five million, four hundred fifty-two thousand".