68381569728 has 84 divisors (see below), whose sum is σ = 202326166848. Its totient is φ = 22058565120.

The previous prime is 68381569687. The next prime is 68381569757. The reversal of 68381569728 is 82796518386.

68381569728 is a `hidden beast` number, since 68 + 3 + 8 + 1 + 569 + 7 + 2 + 8 = 666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1896951 + ... + 1932662.

Almost surely, 2^68381569728 is an apocalyptic number.

It is an amenable number.

68381569728 is an abundant number, since it is smaller than the sum of its proper divisors (133944597120).

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

68381569728 is a wasteful number, since it uses less digits than its factorization.

68381569728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829662 (or 3829649 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 68381569728 in words is "sixty-eight billion, three hundred eighty-one million, five hundred sixty-nine thousand, seven hundred twenty-eight".