68359725851 has 4 divisors (see below), whose sum is σ = 68387039472.
Its totient is φ = 68332412232.
The previous prime is 68359725829. The next prime is 68359725853. The reversal of 68359725851 is 15852795386.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-68359725851 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (68359725853) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13653056 + ... + 13658061.
It is an arithmetic number, because the mean of its divisors is an integer number (17096759868).
Almost surely, 268359725851 is an apocalyptic number.
68359725851 is a deficient number, since it is larger than the sum of its proper divisors (27313621).
68359725851 is a wasteful number, since it uses less digits than its factorization.
68359725851 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 27313620.
The product of its digits is 18144000, while the sum is 59.
The spelling of 68359725851 in words is "sixty-eight billion, three hundred fifty-nine million, seven hundred twenty-five thousand, eight hundred fifty-one".