11133577561 has 2 divisors, whose sum is σ = 11133577562. Its totient is φ = 11133577560.

The previous prime is 11133577531. The next prime is 11133577603. The reversal of 11133577561 is 16577533111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9486760000 + 1646817561 = 97400^2 + 40581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11133577561 is a prime.

It is not a weakly prime, because it can be changed into another prime (11133577531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5566788780 + 5566788781.

It is an arithmetic number, because the mean of its divisors is an integer number (5566788781).

Almost surely, 2^11133577561 is an apocalyptic number.

It is an amenable number.

11133577561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11133577561 is an equidigital number, since it uses as much as digits as its factorization.

11133577561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66150, while the sum is 40.

The spelling of 11133577561 in words is "eleven billion, one hundred thirty-three million, five hundred seventy-seven thousand, five hundred sixty-one".