518386685 has 16 divisors (see below), whose sum is σ = 636206400. Its totient is φ = 405361536.

The previous prime is 518386679. The next prime is 518386697. The reversal of 518386685 is 586683815.

It is a cyclic number.

It is not a de Polignac number, because 518386685 - 2¹⁴ = 518370301 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47897 + ... + 57713.

It is an arithmetic number, because the mean of its divisors is an integer number (39762900).

Almost surely, 2^518386685 is an apocalyptic number.

It is an amenable number.

518386685 is a deficient number, since it is larger than the sum of its proper divisors (117819715).

518386685 is a wasteful number, since it uses less digits than its factorization.

518386685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060.

The product of its digits is 1382400, while the sum is 50.

The square root of 518386685 is about 22768.1067504525. The cubic root of 518386685 is about 803.3126623393.

The spelling of 518386685 in words is "five hundred eighteen million, three hundred eighty-six thousand, six hundred eighty-five".