518630804138 has 8 divisors (see below), whose sum is σ = 778800156480. Its totient is φ = 259030751980.

The previous prime is 518630804129. The next prime is 518630804183. The reversal of 518630804138 is 831408036815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×518630804138² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 518630804092 and 518630804101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142322768 + ... + 142326411.

It is an arithmetic number, because the mean of its divisors is an integer number (97350019560).

Almost surely, 2^518630804138 is an apocalyptic number.

518630804138 is a deficient number, since it is larger than the sum of its proper divisors (260169352342).

518630804138 is a wasteful number, since it uses less digits than its factorization.

518630804138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284650092.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 518630804138 in words is "five hundred eighteen billion, six hundred thirty million, eight hundred four thousand, one hundred thirty-eight".