11556609541 has 2 divisors, whose sum is σ = 11556609542. Its totient is φ = 11556609540.

The previous prime is 11556609527. The next prime is 11556609551. The reversal of 11556609541 is 14590665511.

11556609541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9283322500 + 2273287041 = 96350^2 + 47679^2 .

It is a cyclic number.

It is not a de Polignac number, because 11556609541 - 2¹⁷ = 11556478469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11556609551) 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 as a sum of consecutive naturals, namely, 5778304770 + 5778304771.

It is an arithmetic number, because the mean of its divisors is an integer number (5778304771).

Almost surely, 2^11556609541 is an apocalyptic number.

It is an amenable number.

11556609541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556609541 is an equidigital number, since it uses as much as digits as its factorization.

11556609541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 11556609541 in words is "eleven billion, five hundred fifty-six million, six hundred nine thousand, five hundred forty-one".