321396886128 has 180 divisors, whose sum is σ = 911394743640. Its totient is φ = 97573754880.

The previous prime is 321396886079. The next prime is 321396886133. The reversal of 321396886128 is 821688693123.

321396886128 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13318938 + ... + 13343046.

Almost surely, 2^321396886128 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 321396886128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455697371820).

321396886128 is an abundant number, since it is smaller than the sum of its proper divisors (589997857512).

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

321396886128 is a wasteful number, since it uses less digits than its factorization.

321396886128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24216 (or 24162 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 321396886128 in words is "three hundred twenty-one billion, three hundred ninety-six million, eight hundred eighty-six thousand, one hundred twenty-eight".