518388386855 has 16 divisors (see below), whose sum is σ = 633631766400. Its totient is φ = 407022957600.

The previous prime is 518388386849. The next prime is 518388386861. The reversal of 518388386855 is 558683883815.

It is an interprime number because it is at equal distance from previous prime (518388386849) and next prime (518388386861).

It is not a de Polignac number, because 518388386855 - 2⁴ = 518388386839 is a prime.

It is a super-2 number, since 2×518388386855² (a number of 24 digits) contains 22 as substring.

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, 1236821 + ... + 1602030.

It is an arithmetic number, because the mean of its divisors is an integer number (39601985400).

Almost surely, 2^518388386855 is an apocalyptic number.

518388386855 is a deficient number, since it is larger than the sum of its proper divisors (115243379545).

518388386855 is a wasteful number, since it uses less digits than its factorization.

518388386855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2839534.

The product of its digits is 221184000, while the sum is 68.

The spelling of 518388386855 in words is "five hundred eighteen billion, three hundred eighty-eight million, three hundred eighty-six thousand, eight hundred fifty-five".