868684776912 has 160 divisors (see below), whose sum is σ = 2603116723200. Its totient is φ = 276837948288.

The previous prime is 868684776863. The next prime is 868684777003. The reversal of 868684776912 is 219677486868.

868684776912 is a `hidden beast` number, since 8 + 6 + 8 + 68 + 477 + 6 + 91 + 2 = 666.

It is a super-2 number, since 2×868684776912² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

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 31 ways as a sum of consecutive naturals, for example, 21630483 + ... + 21670605.

It is an arithmetic number, because the mean of its divisors is an integer number (16269479520).

Almost surely, 2^868684776912 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 868684776912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301558361600).

868684776912 is an abundant number, since it is smaller than the sum of its proper divisors (1734431946288).

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

868684776912 is a wasteful number, since it uses less digits than its factorization.

868684776912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42342 (or 42330 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 868684776912 in words is "eight hundred sixty-eight billion, six hundred eighty-four million, seven hundred seventy-six thousand, nine hundred twelve".