320921324794368 has 800 divisors, whose sum is σ = 1065928012490880. Its totient is φ = 95610252165120.

The previous prime is 320921324794271. The next prime is 320921324794423. The reversal of 320921324794368 is 863497423129023.

It is a happy number.

320921324794368 is a `hidden beast` number, since 3 + 2 + 0 + 9 + 21 + 3 + 247 + 9 + 4 + 368 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2253890538 + ... + 2254032918.

Almost surely, 2^{320921324794368} 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 320921324794368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532964006245440).

320921324794368 is an abundant number, since it is smaller than the sum of its proper divisors (745006687696512).

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

320921324794368 is a wasteful number, since it uses less digits than its factorization.

320921324794368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142590 (or 142565 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 63.

The spelling of 320921324794368 in words is "three hundred twenty trillion, nine hundred twenty-one billion, three hundred twenty-four million, seven hundred ninety-four thousand, three hundred sixty-eight".