518790978516 has 24 divisors (see below), whose sum is σ = 1211883216544. Its totient is φ = 172734478560.

The previous prime is 518790978481. The next prime is 518790978521. The reversal of 518790978516 is 615879097815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24469915 + ... + 24491106.

Almost surely, 2^518790978516 is an apocalyptic number.

It is an amenable number.

518790978516 is an abundant number, since it is smaller than the sum of its proper divisors (693092238028).

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

518790978516 is a wasteful number, since it uses less digits than its factorization.

518790978516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48961911 (or 48961909 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 66.

The spelling of 518790978516 in words is "five hundred eighteen billion, seven hundred ninety million, nine hundred seventy-eight thousand, five hundred sixteen".