864782502912 has 264 divisors, whose sum is σ = 2553894712512. Its totient is φ = 281764454400.

The previous prime is 864782502851. The next prime is 864782502953. The reversal of 864782502912 is 219205287468.

864782502912 is a `hidden beast` number, since 8 + 6 + 47 + 8 + 2 + 502 + 91 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80883487 + ... + 80894177.

It is an arithmetic number, because the mean of its divisors is an integer number (9673843608).

Almost surely, 2^864782502912 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 864782502912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276947356256).

864782502912 is an abundant number, since it is smaller than the sum of its proper divisors (1689112209600).

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

864782502912 is a wasteful number, since it uses less digits than its factorization.

864782502912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10915 (or 10894 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 864782502912 in words is "eight hundred sixty-four billion, seven hundred eighty-two million, five hundred two thousand, nine hundred twelve".