11561042068 has 12 divisors (see below), whose sum is σ = 20245587712. Its totient is φ = 5776588440.

The previous prime is 11561042021. The next prime is 11561042149. The reversal of 11561042068 is 86024016511.

It is a congruent number.

It is an unprimeable number.

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, 976530 + ... + 988297.

Almost surely, 2^11561042068 is an apocalyptic number.

It is an amenable number.

11561042068 is a deficient number, since it is larger than the sum of its proper divisors (8684545644).

11561042068 is a wasteful number, since it uses less digits than its factorization.

11561042068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966302 (or 1966300 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 11561042068 its reverse (86024016511), we get a palindrome (97585058579).

The spelling of 11561042068 in words is "eleven billion, five hundred sixty-one million, forty-two thousand, sixty-eight".