68639940096 has 720 divisors, whose sum is σ = 239949298512. Its totient is φ = 17278894080.

The previous prime is 68639940073. The next prime is 68639940097. The reversal of 68639940096 is 69004993686.

It is a happy number.

68639940096 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 2×68639940096² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68639940097) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 940273116 + ... + 940273188.

Almost surely, 2^68639940096 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 68639940096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119974649256).

68639940096 is an abundant number, since it is smaller than the sum of its proper divisors (171309358416).

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

68639940096 is a wasteful number, since it uses less digits than its factorization.

68639940096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 60.

The spelling of 68639940096 in words is "sixty-eight billion, six hundred thirty-nine million, nine hundred forty thousand, ninety-six".