11717128086 has 16 divisors (see below), whose sum is σ = 23488382064. Its totient is φ = 3896688384.

The previous prime is 11717128081. The next prime is 11717128097. The reversal of 11717128086 is 68082171711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717128081) 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, 2252431 + ... + 2257626.

It is an arithmetic number, because the mean of its divisors is an integer number (1468023879).

Almost surely, 2^11717128086 is an apocalyptic number.

11717128086 is an abundant number, since it is smaller than the sum of its proper divisors (11771253978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11717128086 is a wasteful number, since it uses less digits than its factorization.

11717128086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510495.

The product of its (nonzero) digits is 37632, while the sum is 42.

Adding to 11717128086 its reverse (68082171711), we get a palindrome (79799299797).

The spelling of 11717128086 in words is "eleven billion, seven hundred seventeen million, one hundred twenty-eight thousand, eighty-six".