865499994568 has 16 divisors (see below), whose sum is σ = 1770340898160. Its totient is φ = 393409088400.

The previous prime is 865499994559. The next prime is 865499994659.

865499994568 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 865499994491 and 865499994500.

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 3 ways as a sum of consecutive naturals, for example, 4917613518 + ... + 4917613693.

It is an arithmetic number, because the mean of its divisors is an integer number (110646306135).

Almost surely, 2^865499994568 is an apocalyptic number.

865499994568 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

865499994568 is an abundant number, since it is smaller than the sum of its proper divisors (904840903592).

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

865499994568 is a wasteful number, since it uses less digits than its factorization.

865499994568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835227228 (or 9835227224 counting only the distinct ones).

The product of its digits is 6046617600, while the sum is 82.

The spelling of 865499994568 in words is "eight hundred sixty-five billion, four hundred ninety-nine million, nine hundred ninety-four thousand, five hundred sixty-eight".