68644712576 has 64 divisors (see below), whose sum is σ = 149392676160. Its totient is φ = 31158758400.

The previous prime is 68644712557. The next prime is 68644712599. The reversal of 68644712576 is 67521744686.

68644712576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990086 + ... + 1057146.

It is an arithmetic number, because the mean of its divisors is an integer number (2334260565).

Almost surely, 2^68644712576 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 68644712576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74696338080).

68644712576 is an abundant number, since it is smaller than the sum of its proper divisors (80747963584).

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

68644712576 is a wasteful number, since it uses less digits than its factorization.

68644712576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67813 (or 67801 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 56.

The spelling of 68644712576 in words is "sixty-eight billion, six hundred forty-four million, seven hundred twelve thousand, five hundred seventy-six".