321644868716 has 24 divisors (see below), whose sum is σ = 571588761744. Its totient is φ = 158341512960.

The previous prime is 321644868691. The next prime is 321644868731. The reversal of 321644868716 is 617868446123.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797825 + ... + 1131288.

It is an arithmetic number, because the mean of its divisors is an integer number (23816198406).

Almost surely, 2^321644868716 is an apocalyptic number.

It is an amenable number.

321644868716 is a deficient number, since it is larger than the sum of its proper divisors (249943893028).

321644868716 is a wasteful number, since it uses less digits than its factorization.

321644868716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929761 (or 1929759 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The spelling of 321644868716 in words is "three hundred twenty-one billion, six hundred forty-four million, eight hundred sixty-eight thousand, seven hundred sixteen".