518931079550 has 48 divisors (see below), whose sum is σ = 1084652765280. Its totient is φ = 183274650240.

The previous prime is 518931079549. The next prime is 518931079571. The reversal of 518931079550 is 55970139815.

It is a junction number, because it is equal to n+sod(n) for n = 518931079492 and 518931079501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17340605 + ... + 17370504.

It is an arithmetic number, because the mean of its divisors is an integer number (22596932610).

Almost surely, 2^518931079550 is an apocalyptic number.

518931079550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

518931079550 is an abundant number, since it is smaller than the sum of its proper divisors (565721685730).

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

518931079550 is a wasteful number, since it uses less digits than its factorization.

518931079550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34711157 (or 34711152 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 53.

The spelling of 518931079550 in words is "five hundred eighteen billion, nine hundred thirty-one million, seventy-nine thousand, five hundred fifty".