868392855612 has 240 divisors, whose sum is σ = 2388840854400. Its totient is φ = 274705966080.

The previous prime is 868392855607. The next prime is 868392855647. The reversal of 868392855612 is 216558293868.

868392855612 is a `hidden beast` number, since 8 + 6 + 8 + 3 + 9 + 2 + 8 + 5 + 5 + 612 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 868392855612.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 172949662 + ... + 172954682.

It is an arithmetic number, because the mean of its divisors is an integer number (9953503560).

Almost surely, 2^868392855612 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 868392855612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194420427200).

868392855612 is an abundant number, since it is smaller than the sum of its proper divisors (1520447998788).

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

868392855612 is a wasteful number, since it uses less digits than its factorization.

868392855612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378 (or 5367 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 868392855612 in words is "eight hundred sixty-eight billion, three hundred ninety-two million, eight hundred fifty-five thousand, six hundred twelve".