320412232715520 has 432 divisors, whose sum is σ = 1131017184251136. Its totient is φ = 77246525030400.

The previous prime is 320412232715503. The next prime is 320412232715623. The reversal of 320412232715520 is 25517232214023.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 82194889 + ... + 86004791.

Almost surely, 2^{320412232715520} is an apocalyptic number.

320412232715520 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 320412232715520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565508592125568).

320412232715520 is an abundant number, since it is smaller than the sum of its proper divisors (810604951535616).

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

320412232715520 is a wasteful number, since it uses less digits than its factorization.

320412232715520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810130 (or 3810105 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

Adding to 320412232715520 its reverse (25517232214023), we get a palindrome (345929464929543).

The spelling of 320412232715520 in words is "three hundred twenty trillion, four hundred twelve billion, two hundred thirty-two million, seven hundred fifteen thousand, five hundred twenty".