68609134720 has 64 divisors (see below), whose sum is σ = 187449969600. Its totient is φ = 23523130368.

The previous prime is 68609134709. The next prime is 68609134747. The reversal of 68609134720 is 2743190686.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7652790 + ... + 7661749.

It is an arithmetic number, because the mean of its divisors is an integer number (2928905775).

Almost surely, 2^68609134720 is an apocalyptic number.

It is an amenable number.

68609134720 is an abundant number, since it is smaller than the sum of its proper divisors (118840834880).

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

68609134720 is a wasteful number, since it uses less digits than its factorization.

68609134720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15314565 (or 15314553 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 68609134720 in words is "sixty-eight billion, six hundred nine million, one hundred thirty-four thousand, seven hundred twenty".