11717268887 has 6 divisors (see below), whose sum is σ = 12447064488. Its totient is φ = 11028017504.

The previous prime is 11717268883. The next prime is 11717268907. The reversal of 11717268887 is 78886271711.

It is not a de Polignac number, because 11717268887 - 2² = 11717268883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717268883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20271803 + ... + 20272380.

It is an arithmetic number, because the mean of its divisors is an integer number (2074510748).

Almost surely, 2^11717268887 is an apocalyptic number.

11717268887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11717268887 is a deficient number, since it is larger than the sum of its proper divisors (729795601).

11717268887 is an equidigital number, since it uses as much as digits as its factorization.

11717268887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40544217 (or 40544200 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 56.

The spelling of 11717268887 in words is "eleven billion, seven hundred seventeen million, two hundred sixty-eight thousand, eight hundred eighty-seven".