11116035561 has 4 divisors (see below), whose sum is σ = 14821380752. Its totient is φ = 7410690372.

The previous prime is 11116035547. The next prime is 11116035571. The reversal of 11116035561 is 16553061111.

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 de Polignac number, because none of the positive numbers 2^k-11116035561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11116035571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1852672591 + ... + 1852672596.

It is an arithmetic number, because the mean of its divisors is an integer number (3705345188).

Almost surely, 2^11116035561 is an apocalyptic number.

It is an amenable number.

11116035561 is a deficient number, since it is larger than the sum of its proper divisors (3705345191).

11116035561 is an equidigital number, since it uses as much as digits as its factorization.

11116035561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705345190.

The product of its (nonzero) digits is 2700, while the sum is 30.

Adding to 11116035561 its reverse (16553061111), we get a palindrome (27669096672).

The spelling of 11116035561 in words is "eleven billion, one hundred sixteen million, thirty-five thousand, five hundred sixty-one".