68712729968 has 80 divisors (see below), whose sum is σ = 142086144000. Its totient is φ = 32096653056.

The previous prime is 68712729887. The next prime is 68712729971. The reversal of 68712729968 is 86992721786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30715346 + ... + 30717582.

It is an arithmetic number, because the mean of its divisors is an integer number (1776076800).

Almost surely, 2^68712729968 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 68712729968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71043072000).

68712729968 is an abundant number, since it is smaller than the sum of its proper divisors (73373414032).

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

68712729968 is a wasteful number, since it uses less digits than its factorization.

68712729968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622 (or 3616 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 65.

The spelling of 68712729968 in words is "sixty-eight billion, seven hundred twelve million, seven hundred twenty-nine thousand, nine hundred sixty-eight".