868585585868 has 96 divisors (see below), whose sum is σ = 2043473069568. Its totient is φ = 311980377600.

The previous prime is 868585585853. The next prime is 868585585897.

It is a happy number.

868585585868 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 868585585792 and 868585585801.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3013328 + ... + 3288968.

It is an arithmetic number, because the mean of its divisors is an integer number (21286177808).

Almost surely, 2^868585585868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868585585868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021736534784).

868585585868 is an abundant number, since it is smaller than the sum of its proper divisors (1174887483700).

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

868585585868 is a wasteful number, since it uses less digits than its factorization.

868585585868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276463 (or 276461 counting only the distinct ones).

The product of its digits is 5898240000, while the sum is 80.

The spelling of 868585585868 in words is "eight hundred sixty-eight billion, five hundred eighty-five million, five hundred eighty-five thousand, eight hundred sixty-eight".