515791957872 has 80 divisors (see below), whose sum is σ = 1362001969152. Its totient is φ = 168125510400.

The previous prime is 515791957861. The next prime is 515791957909. The reversal of 515791957872 is 278759197515.

515791957872 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 2497338 + ... + 2695974.

Almost surely, 2^515791957872 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 515791957872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681000984576).

515791957872 is an abundant number, since it is smaller than the sum of its proper divisors (846210011280).

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

515791957872 is a wasteful number, since it uses less digits than its factorization.

515791957872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199846 (or 199840 counting only the distinct ones).

The product of its digits is 55566000, while the sum is 66.

The spelling of 515791957872 in words is "five hundred fifteen billion, seven hundred ninety-one million, nine hundred fifty-seven thousand, eight hundred seventy-two".