28217123275117 has 16 divisors (see below), whose sum is σ = 32285806833280. Its totient is φ = 24157858156992.

The previous prime is 28217123275063. The next prime is 28217123275129. The reversal of 28217123275117 is 71157232171282.

It is not a de Polignac number, because 28217123275117 - 2¹¹ = 28217123273069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28217123279117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224758759 + ... + 224884267.

It is an arithmetic number, because the mean of its divisors is an integer number (2017862927080).

Almost surely, 2^{28217123275117} is an apocalyptic number.

It is an amenable number.

28217123275117 is a deficient number, since it is larger than the sum of its proper divisors (4068683558163).

28217123275117 is a wasteful number, since it uses less digits than its factorization.

28217123275117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162772.

The product of its digits is 658560, while the sum is 49.

The spelling of 28217123275117 in words is "twenty-eight trillion, two hundred seventeen billion, one hundred twenty-three million, two hundred seventy-five thousand, one hundred seventeen".