321913789745 has 16 divisors (see below), whose sum is σ = 390200695632. Its totient is φ = 254929305600.

The previous prime is 321913789739. The next prime is 321913789753. The reversal of 321913789745 is 547987319123.

It can be written as a sum of positive squares in 8 ways, for example, as 19532578081 + 302381211664 = 139759^2 + 549892^2 .

It is a de Polignac number, because none of the positive numbers 2^k-321913789745 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 2519729 + ... + 2644401.

It is an arithmetic number, because the mean of its divisors is an integer number (24387543477).

Almost surely, 2^321913789745 is an apocalyptic number.

It is an amenable number.

321913789745 is a deficient number, since it is larger than the sum of its proper divisors (68286905887).

321913789745 is a wasteful number, since it uses less digits than its factorization.

321913789745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129892.

The product of its digits is 11430720, while the sum is 59.

The spelling of 321913789745 in words is "three hundred twenty-one billion, nine hundred thirteen million, seven hundred eighty-nine thousand, seven hundred forty-five".