11172827161 has 6 divisors (see below), whose sum is σ = 11358994686. Its totient is φ = 10989662400.

The previous prime is 11172827147. The next prime is 11172827177. The reversal of 11172827161 is 16172827111.

11172827161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 983136025 + 10189691136 = 31355^2 + 100944^2 .

It is not a de Polignac number, because 11172827161 - 2⁷ = 11172827033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11172827161.

It is not an unprimeable number, because it can be changed into a prime (11172827101) 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 5 ways as a sum of consecutive naturals, for example, 1497600 + ... + 1505041.

It is an arithmetic number, because the mean of its divisors is an integer number (1893165781).

Almost surely, 2^11172827161 is an apocalyptic number.

It is an amenable number.

11172827161 is a deficient number, since it is larger than the sum of its proper divisors (186167525).

11172827161 is an frugal number, since it uses more digits than its factorization.

11172827161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002763 (or 3002702 counting only the distinct ones).

The product of its digits is 9408, while the sum is 37.

The spelling of 11172827161 in words is "eleven billion, one hundred seventy-two million, eight hundred twenty-seven thousand, one hundred sixty-one".