518113681 has 8 divisors (see below), whose sum is σ = 537534720. Its totient is φ = 498796368.

The previous prime is 518113669. The next prime is 518113691. The reversal of 518113681 is 186311815.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518113681 is a prime.

It is a super-2 number, since 2×518113681² = 536883572878739522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (518113601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15681 + ... + 35806.

It is an arithmetic number, because the mean of its divisors is an integer number (67191840).

Almost surely, 2^518113681 is an apocalyptic number.

It is an amenable number.

518113681 is a deficient number, since it is larger than the sum of its proper divisors (19421039).

518113681 is a wasteful number, since it uses less digits than its factorization.

518113681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51863.

The product of its digits is 5760, while the sum is 34.

The square root of 518113681 is about 22762.1106446656. The cubic root of 518113681 is about 803.1716182844.

The spelling of 518113681 in words is "five hundred eighteen million, one hundred thirteen thousand, six hundred eighty-one".