321435644660 has 96 divisors (see below), whose sum is σ = 732640191360. Its totient is φ = 117755638272.

The previous prime is 321435644627. The next prime is 321435644687. The reversal of 321435644660 is 66446534123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26227094 + ... + 26239346.

It is an arithmetic number, because the mean of its divisors is an integer number (7631668660).

Almost surely, 2^321435644660 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 321435644660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366320095680).

321435644660 is an abundant number, since it is smaller than the sum of its proper divisors (411204546700).

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

321435644660 is a wasteful number, since it uses less digits than its factorization.

321435644660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13057 (or 13055 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 321435644660 in words is "three hundred twenty-one billion, four hundred thirty-five million, six hundred forty-four thousand, six hundred sixty".