518638168 has 8 divisors (see below), whose sum is σ = 972446580. Its totient is φ = 259319080.

The previous prime is 518638163. The next prime is 518638171. The reversal of 518638168 is 861836815.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518638163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32414878 + ... + 32414893.

Almost surely, 2^518638168 is an apocalyptic number.

It is an amenable number.

518638168 is a deficient number, since it is larger than the sum of its proper divisors (453808412).

518638168 is a wasteful number, since it uses less digits than its factorization.

518638168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64829777 (or 64829773 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 518638168 is about 22773.6287841881. The cubic root of 518638168 is about 803.4425440310.

It can be divided in two parts, 51863 and 8168, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 518638168 in words is "five hundred eighteen million, six hundred thirty-eight thousand, one hundred sixty-eight".