68109755173 has 4 divisors (see below), whose sum is σ = 68214058668. Its totient is φ = 68005451680.

The previous prime is 68109755167. The next prime is 68109755191. The reversal of 68109755173 is 37155790186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46845407844 + 21264347329 = 216438^2 + 145823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68109755173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68109755173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109752173) 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, 52150768 + ... + 52152073.

It is an arithmetic number, because the mean of its divisors is an integer number (17053514667).

Almost surely, 2^68109755173 is an apocalyptic number.

It is an amenable number.

68109755173 is a deficient number, since it is larger than the sum of its proper divisors (104303495).

68109755173 is a wasteful number, since it uses less digits than its factorization.

68109755173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104303494.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 68109755173 in words is "sixty-eight billion, one hundred nine million, seven hundred fifty-five thousand, one hundred seventy-three".