518868868815 has 48 divisors (see below), whose sum is σ = 985783982976. Its totient is φ = 250380446400.

The previous prime is 518868868807. The next prime is 518868868823.

518868868815 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (518868868807) and next prime (518868868823).

It is not a de Polignac number, because 518868868815 - 2³ = 518868868807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2379489 + ... + 2588378.

It is an arithmetic number, because the mean of its divisors is an integer number (20537166312).

Almost surely, 2^518868868815 is an apocalyptic number.

518868868815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

518868868815 is a deficient number, since it is larger than the sum of its proper divisors (466915114161).

518868868815 is a wasteful number, since it uses less digits than its factorization.

518868868815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968100 (or 4968097 counting only the distinct ones).

The product of its digits is 235929600, while the sum is 72.

The spelling of 518868868815 in words is "five hundred eighteen billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, eight hundred fifteen".