18463085865 has 64 divisors (see below), whose sum is σ = 38722437120. Its totient is φ = 8167988160.

The previous prime is 18463085833. The next prime is 18463085887. The reversal of 18463085865 is 56858036481.

18463085865 is a `hidden beast` number, since 18 + 46 + 3 + 0 + 8 + 586 + 5 = 666.

It is not a de Polignac number, because 18463085865 - 2⁵ = 18463085833 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 285829 + ... + 344418.

It is an arithmetic number, because the mean of its divisors is an integer number (605038080).

Almost surely, 2^18463085865 is an apocalyptic number.

18463085865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18463085865 is an abundant number, since it is smaller than the sum of its proper divisors (20259351255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18463085865 is a wasteful number, since it uses less digits than its factorization.

18463085865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630299 (or 630293 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 18463085865 in words is "eighteen billion, four hundred sixty-three million, eighty-five thousand, eight hundred sixty-five".