518009855 has 16 divisors (see below), whose sum is σ = 678564000. Its totient is φ = 376488960.

The previous prime is 518009819. The next prime is 518009893. The reversal of 518009855 is 558900815.

It is a de Polignac number, because none of the positive numbers 2^k-518009855 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166151 + ... + 169239.

It is an arithmetic number, because the mean of its divisors is an integer number (42410250).

Almost surely, 2^518009855 is an apocalyptic number.

518009855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

518009855 is a deficient number, since it is larger than the sum of its proper divisors (160554145).

518009855 is a wasteful number, since it uses less digits than its factorization.

518009855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6154.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 518009855 is about 22759.8298543728. The cubic root of 518009855 is about 803.1179648937.

The spelling of 518009855 in words is "five hundred eighteen million, nine thousand, eight hundred fifty-five".