7878663231824 has 160 divisors (see below), whose sum is σ = 19490695372800. Its totient is φ = 2995921797120.

The previous prime is 7878663231793. The next prime is 7878663231827. The reversal of 7878663231824 is 4281323668787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878663231827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20598032 + ... + 20977040.

It is an arithmetic number, because the mean of its divisors is an integer number (121816846080).

Almost surely, 2^{7878663231824} 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 7878663231824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9745347686400).

7878663231824 is an abundant number, since it is smaller than the sum of its proper divisors (11612032140976).

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

7878663231824 is a wasteful number, since it uses less digits than its factorization.

7878663231824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379441 (or 379435 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 65.

The spelling of 7878663231824 in words is "seven trillion, eight hundred seventy-eight billion, six hundred sixty-three million, two hundred thirty-one thousand, eight hundred twenty-four".