11561331226 has 16 divisors (see below), whose sum is σ = 18117629640. Its totient is φ = 5526068800.

The previous prime is 11561331211. The next prime is 11561331227. The reversal of 11561331226 is 62213316511.

11561331226 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 4 ways, for example, as 11445790225 + 115541001 = 106985^2 + 10749^2 .

It is not an unprimeable number, because it can be changed into a prime (11561331227) 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 7 ways as a sum of consecutive naturals, for example, 980941 + ... + 992656.

Almost surely, 2^11561331226 is an apocalyptic number.

11561331226 is a deficient number, since it is larger than the sum of its proper divisors (6556298414).

11561331226 is a wasteful number, since it uses less digits than its factorization.

11561331226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973729.

The product of its digits is 6480, while the sum is 31.

Adding to 11561331226 its reverse (62213316511), we get a palindrome (73774647737).

The spelling of 11561331226 in words is "eleven billion, five hundred sixty-one million, three hundred thirty-one thousand, two hundred twenty-six".