3218978638848 has 528 divisors, whose sum is σ = 10326619134720. Its totient is φ = 872949841920.

The previous prime is 3218978638819. The next prime is 3218978638907. The reversal of 3218978638848 is 8488368798123.

It is a self number, because there is not a number n which added to its sum of digits gives 3218978638848.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1095261763 + ... + 1095264701.

Almost surely, 2^{3218978638848} 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 3218978638848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5163309567360).

3218978638848 is an abundant number, since it is smaller than the sum of its proper divisors (7107640495872).

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

3218978638848 is a wasteful number, since it uses less digits than its factorization.

3218978638848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084 (or 3035 counting only the distinct ones).

The product of its digits is 891813888, while the sum is 75.

The spelling of 3218978638848 in words is "three trillion, two hundred eighteen billion, nine hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred forty-eight".