65828172689 has 8 divisors (see below), whose sum is σ = 66081466728. Its totient is φ = 65575319040.

The previous prime is 65828172677. The next prime is 65828172703. The reversal of 65828172689 is 98627182856.

It can be written as a sum of positive squares in 4 ways, for example, as 15106376464 + 50721796225 = 122908^2 + 225215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65828172689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65828172589) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 191009 + ... + 410049.

It is an arithmetic number, because the mean of its divisors is an integer number (8260183341).

Almost surely, 2^65828172689 is an apocalyptic number.

It is an amenable number.

65828172689 is a deficient number, since it is larger than the sum of its proper divisors (253294039).

65828172689 is a wasteful number, since it uses less digits than its factorization.

65828172689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220195.

The product of its digits is 23224320, while the sum is 62.

The spelling of 65828172689 in words is "sixty-five billion, eight hundred twenty-eight million, one hundred seventy-two thousand, six hundred eighty-nine".