11517716887 has 2 divisors, whose sum is σ = 11517716888. Its totient is φ = 11517716886.

The previous prime is 11517716867. The next prime is 11517716909. The reversal of 11517716887 is 78861771511.

11517716887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11517716887 - 2⁷ = 11517716759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11517716857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758858443 + 5758858444.

It is an arithmetic number, because the mean of its divisors is an integer number (5758858444).

Almost surely, 2^11517716887 is an apocalyptic number.

11517716887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11517716887 is an equidigital number, since it uses as much as digits as its factorization.

11517716887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 658560, while the sum is 52.

The spelling of 11517716887 in words is "eleven billion, five hundred seventeen million, seven hundred sixteen thousand, eight hundred eighty-seven".