320284178864 has 80 divisors (see below), whose sum is σ = 673447313280. Its totient is φ = 147557928960.

The previous prime is 320284178857. The next prime is 320284178873. The reversal of 320284178864 is 468871482023.

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, 20274809 + ... + 20290599.

It is an arithmetic number, because the mean of its divisors is an integer number (8418091416).

Almost surely, 2^320284178864 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 320284178864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336723656640).

320284178864 is an abundant number, since it is smaller than the sum of its proper divisors (353163134416).

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

320284178864 is a wasteful number, since it uses less digits than its factorization.

320284178864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16415 (or 16383 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 53.

The spelling of 320284178864 in words is "three hundred twenty billion, two hundred eighty-four million, one hundred seventy-eight thousand, eight hundred sixty-four".