68128679268 has 36 divisors (see below), whose sum is σ = 185461405948. Its totient is φ = 20962670400.

The previous prime is 68128679207. The next prime is 68128679291. The reversal of 68128679268 is 86297682186.

It can be written as a sum of positive squares in 2 ways, for example, as 13170316644 + 54958362624 = 114762^2 + 234432^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72786583 + ... + 72787518.

Almost surely, 2^68128679268 is an apocalyptic number.

It is an amenable number.

68128679268 is an abundant number, since it is smaller than the sum of its proper divisors (117332726680).

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

68128679268 is a wasteful number, since it uses less digits than its factorization.

68128679268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145574124 (or 145574119 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 68128679268 in words is "sixty-eight billion, one hundred twenty-eight million, six hundred seventy-nine thousand, two hundred sixty-eight".