865285456668 has 24 divisors (see below), whose sum is σ = 2047436012160. Its totient is φ = 284366112240.

The previous prime is 865285456657. The next prime is 865285456681. The reversal of 865285456668 is 866654582568.

It is a super-2 number, since 2×865285456668² (a number of 25 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507795778 + ... + 507797481.

It is an arithmetic number, because the mean of its divisors is an integer number (85309833840).

Almost surely, 2^865285456668 is an apocalyptic number.

It is an amenable number.

865285456668 is an abundant number, since it is smaller than the sum of its proper divisors (1182150555492).

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

865285456668 is a wasteful number, since it uses less digits than its factorization.

865285456668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015593337 (or 1015593335 counting only the distinct ones).

The product of its digits is 663552000, while the sum is 69.

The spelling of 865285456668 in words is "eight hundred sixty-five billion, two hundred eighty-five million, four hundred fifty-six thousand, six hundred sixty-eight".