11533242161 has 12 divisors (see below), whose sum is σ = 13442607540. Its totient is φ = 9866193120.

The previous prime is 11533242109. The next prime is 11533242163. The reversal of 11533242161 is 16124233511.

It can be written as a sum of positive squares in 2 ways, for example, as 6110392561 + 5422849600 = 78169^2 + 73640^2 .

It is not a de Polignac number, because 11533242161 - 2²⁶ = 11466133297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533242163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206270 + ... + 256151.

It is an arithmetic number, because the mean of its divisors is an integer number (1120217295).

Almost surely, 2^11533242161 is an apocalyptic number.

It is an amenable number.

11533242161 is a deficient number, since it is larger than the sum of its proper divisors (1909365379).

11533242161 is an equidigital number, since it uses as much as digits as its factorization.

11533242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462944 (or 462937 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

Adding to 11533242161 its reverse (16124233511), we get a palindrome (27657475672).

The spelling of 11533242161 in words is "eleven billion, five hundred thirty-three million, two hundred forty-two thousand, one hundred sixty-one".