28236112717 has 2 divisors, whose sum is σ = 28236112718. Its totient is φ = 28236112716.

The previous prime is 28236112699. The next prime is 28236112721. The reversal of 28236112717 is 71721163282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18369465156 + 9866647561 = 135534^2 + 99331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28236112717 is a prime.

It is a super-2 number, since 2×28236112717² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28236112717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28236112117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14118056358 + 14118056359.

It is an arithmetic number, because the mean of its divisors is an integer number (14118056359).

Almost surely, 2^28236112717 is an apocalyptic number.

It is an amenable number.

28236112717 is a deficient number, since it is larger than the sum of its proper divisors (1).

28236112717 is an equidigital number, since it uses as much as digits as its factorization.

28236112717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

Adding to 28236112717 its reverse (71721163282), we get a palindrome (99957275999).

The spelling of 28236112717 in words is "twenty-eight billion, two hundred thirty-six million, one hundred twelve thousand, seven hundred seventeen".