7999518144 has 112 divisors (see below), whose sum is σ = 21402665856. Its totient is φ = 2636774400.

The previous prime is 7999518133. The next prime is 7999518157. The reversal of 7999518144 is 4418159997.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 14009379 + ... + 14009949.

Almost surely, 2^7999518144 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 7999518144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10701332928).

7999518144 is an abundant number, since it is smaller than the sum of its proper divisors (13403147712).

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

7999518144 is a wasteful number, since it uses less digits than its factorization.

7999518144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1264 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 57.

The square root of 7999518144 is about 89440.0254025009. The cubic root of 7999518144 is about 1999.9598445271.

The spelling of 7999518144 in words is "seven billion, nine hundred ninety-nine million, five hundred eighteen thousand, one hundred forty-four".