518891799680 has 256 divisors, whose sum is σ = 1388095315200. Its totient is φ = 184327077888.

The previous prime is 518891799653. The next prime is 518891799683. The reversal of 518891799680 is 86997198815.

It is not an unprimeable number, because it can be changed into a prime (518891799683) 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, 53122157 + ... + 53131923.

It is an arithmetic number, because the mean of its divisors is an integer number (5422247325).

Almost surely, 2^518891799680 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 518891799680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694047657600).

518891799680 is an abundant number, since it is smaller than the sum of its proper divisors (869203515520).

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

518891799680 is a wasteful number, since it uses less digits than its factorization.

518891799680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10079 (or 10067 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 71.

The spelling of 518891799680 in words is "five hundred eighteen billion, eight hundred ninety-one million, seven hundred ninety-nine thousand, six hundred eighty".