68123994789664 has 48 divisors (see below), whose sum is σ = 147606555972960. Its totient is φ = 30691421608960.

The previous prime is 68123994789659. The next prime is 68123994789667. The reversal of 68123994789664 is 46698749932186.

68123994789664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×68123994789664² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68123994789667) 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 7 ways as a sum of consecutive naturals, for example, 856305694 + ... + 856385245.

It is an arithmetic number, because the mean of its divisors is an integer number (3075136582770).

Almost surely, 2^{68123994789664} is an apocalyptic number.

It is an amenable number.

68123994789664 is an abundant number, since it is smaller than the sum of its proper divisors (79482561183296).

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

68123994789664 is a wasteful number, since it uses less digits than its factorization.

68123994789664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712691073 (or 1712691065 counting only the distinct ones).

The product of its digits is 6772211712, while the sum is 82.

The spelling of 68123994789664 in words is "sixty-eight trillion, one hundred twenty-three billion, nine hundred ninety-four million, seven hundred eighty-nine thousand, six hundred sixty-four".