11960588561 has 4 divisors (see below), whose sum is σ = 12664152612. Its totient is φ = 11257024512.

The previous prime is 11960588537. The next prime is 11960588573. The reversal of 11960588561 is 16588506911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7628974336 + 4331614225 = 87344^2 + 65815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11960588561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11960588531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351782000 + ... + 351782033.

It is an arithmetic number, because the mean of its divisors is an integer number (3166038153).

Almost surely, 2^11960588561 is an apocalyptic number.

It is an amenable number.

11960588561 is a deficient number, since it is larger than the sum of its proper divisors (703564051).

11960588561 is an equidigital number, since it uses as much as digits as its factorization.

11960588561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703564050.

The product of its (nonzero) digits is 518400, while the sum is 50.

The spelling of 11960588561 in words is "eleven billion, nine hundred sixty million, five hundred eighty-eight thousand, five hundred sixty-one".