11042085561 has 32 divisors (see below), whose sum is σ = 16168965120. Its totient is φ = 6660935424.

The previous prime is 11042085557. The next prime is 11042085563. The reversal of 11042085561 is 16558024011.

It is not a de Polignac number, because 11042085561 - 2² = 11042085557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11042085563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3634335 + ... + 3637371.

It is an arithmetic number, because the mean of its divisors is an integer number (505280160).

Almost surely, 2^11042085561 is an apocalyptic number.

It is an amenable number.

11042085561 is a deficient number, since it is larger than the sum of its proper divisors (5126879559).

11042085561 is a wasteful number, since it uses less digits than its factorization.

11042085561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4865.

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 11042085561 in words is "eleven billion, forty-two million, eighty-five thousand, five hundred sixty-one".