11215411717 has 6 divisors (see below), whose sum is σ = 11913949778. Its totient is φ = 10555681344.

The previous prime is 11215411709. The next prime is 11215411729. The reversal of 11215411717 is 71711451211.

11215411717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 4372647876 + 6842763841 = 66126^2 + 82721^2 .

It is not a de Polignac number, because 11215411717 - 2³ = 11215411709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215411817) 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 in 5 ways as a sum of consecutive naturals, for example, 19403538 + ... + 19404115.

Almost surely, 2^11215411717 is an apocalyptic number.

11215411717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11215411717 is a deficient number, since it is larger than the sum of its proper divisors (698538061).

11215411717 is an equidigital number, since it uses as much as digits as its factorization.

11215411717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38807687 (or 38807670 counting only the distinct ones).

The product of its digits is 1960, while the sum is 31.

Adding to 11215411717 its reverse (71711451211), we get a palindrome (82926862928).

The spelling of 11215411717 in words is "eleven billion, two hundred fifteen million, four hundred eleven thousand, seven hundred seventeen".