321996608388 has 288 divisors, whose sum is σ = 1061737657344. Its totient is φ = 79848198144.

The previous prime is 321996608299. The next prime is 321996608411. The reversal of 321996608388 is 883806699123.

321996608388 is a `hidden beast` number, since 3 + 2 + 19 + 9 + 6 + 608 + 3 + 8 + 8 = 666.

321996608388 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 73901106 + ... + 73905462.

It is an arithmetic number, because the mean of its divisors is an integer number (3686589088).

Almost surely, 2^321996608388 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 321996608388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530868828672).

321996608388 is an abundant number, since it is smaller than the sum of its proper divisors (739741048956).

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

321996608388 is a wasteful number, since it uses less digits than its factorization.

321996608388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731 (or 5726 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 321996608388 in words is "three hundred twenty-one billion, nine hundred ninety-six million, six hundred eight thousand, three hundred eighty-eight".