11056011161 has 4 divisors (see below), whose sum is σ = 11906473572. Its totient is φ = 10205548752.

The previous prime is 11056011143. The next prime is 11056011173. The reversal of 11056011161 is 16111065011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6557760400 + 4498250761 = 80980^2 + 67069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11056011161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11056071161) 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, 425231186 + ... + 425231211.

It is an arithmetic number, because the mean of its divisors is an integer number (2976618393).

Almost surely, 2^11056011161 is an apocalyptic number.

It is an amenable number.

11056011161 is a deficient number, since it is larger than the sum of its proper divisors (850462411).

11056011161 is an equidigital number, since it uses as much as digits as its factorization.

11056011161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850462410.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 11056011161 its reverse (16111065011), we get a palindrome (27167076172).

The spelling of 11056011161 in words is "eleven billion, fifty-six million, eleven thousand, one hundred sixty-one".