1116511161 has 4 divisors (see below), whose sum is σ = 1488681552. Its totient is φ = 744340772.

The previous prime is 1116511153. The next prime is 1116511163. The reversal of 1116511161 is 1611156111.

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 not a de Polignac number, because 1116511161 - 2³ = 1116511153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1116511163) 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, 186085191 + ... + 186085196.

It is an arithmetic number, because the mean of its divisors is an integer number (372170388).

Almost surely, 2^1116511161 is an apocalyptic number.

It is an amenable number.

1116511161 is a deficient number, since it is larger than the sum of its proper divisors (372170391).

1116511161 is an equidigital number, since it uses as much as digits as its factorization.

1116511161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372170390.

The product of its digits is 180, while the sum is 24.

The square root of 1116511161 is about 33414.2359032793. The cubic root of 1116511161 is about 1037.4193787646.

Adding to 1116511161 its reverse (1611156111), we get a palindrome (2727667272).

The spelling of 1116511161 in words is "one billion, one hundred sixteen million, five hundred eleven thousand, one hundred sixty-one".