11268884561 has 4 divisors (see below), whose sum is σ = 12293328624. Its totient is φ = 10244440500.

The previous prime is 11268884527. The next prime is 11268884573. The reversal of 11268884561 is 16548886211.

11268884561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11268884561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11268887561) 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 3 ways as a sum of consecutive naturals, for example, 512222015 + ... + 512222036.

It is an arithmetic number, because the mean of its divisors is an integer number (3073332156).

Almost surely, 2^11268884561 is an apocalyptic number.

11268884561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11268884561 is a deficient number, since it is larger than the sum of its proper divisors (1024444063).

11268884561 is a wasteful number, since it uses less digits than its factorization.

11268884561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024444062.

The product of its digits is 737280, while the sum is 50.

The spelling of 11268884561 in words is "eleven billion, two hundred sixty-eight million, eight hundred eighty-four thousand, five hundred sixty-one".