321155397696 has 112 divisors (see below), whose sum is σ = 991774918656. Its totient is φ = 89806354944.

The previous prime is 321155397659. The next prime is 321155397701. The reversal of 321155397696 is 696793551123.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2478906 + ... + 2605241.

Almost surely, 2^321155397696 is an apocalyptic number.

It is an amenable number.

321155397696 is an abundant number, since it is smaller than the sum of its proper divisors (670619520960).

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

321155397696 is a wasteful number, since it uses less digits than its factorization.

321155397696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084216 (or 5084206 counting only the distinct ones).

The product of its digits is 9185400, while the sum is 57.

The spelling of 321155397696 in words is "three hundred twenty-one billion, one hundred fifty-five million, three hundred ninety-seven thousand, six hundred ninety-six".