68716616544 has 192 divisors, whose sum is σ = 204225235200. Its totient is φ = 22472626176.

The previous prime is 68716616543. The next prime is 68716616557. The reversal of 68716616544 is 44561661786.

68716616544 is a `hidden beast` number, since 6 + 8 + 7 + 16 + 616 + 5 + 4 + 4 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68716616543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34305847 + ... + 34307849.

It is an arithmetic number, because the mean of its divisors is an integer number (1063673100).

Almost surely, 2^68716616544 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 68716616544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102112617600).

68716616544 is an abundant number, since it is smaller than the sum of its proper divisors (135508618656).

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

68716616544 is a wasteful number, since it uses less digits than its factorization.

68716616544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754 (or 2740 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 68716616544 in words is "sixty-eight billion, seven hundred sixteen million, six hundred sixteen thousand, five hundred forty-four".