11563644042 has 24 divisors (see below), whose sum is σ = 25079882880. Its totient is φ = 3850652520.

The previous prime is 11563644041. The next prime is 11563644061. The reversal of 11563644042 is 24044636511.

11563644042 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 3 + 644 + 0 + 4 + 2 = 666.

11563644042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11563643988 and 11563644006.

It is not an unprimeable number, because it can be changed into a prime (11563644041) 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 in 11 ways as a sum of consecutive naturals, for example, 306292 + ... + 341967.

It is an arithmetic number, because the mean of its divisors is an integer number (1044995120).

Almost surely, 2^11563644042 is an apocalyptic number.

11563644042 is an abundant number, since it is smaller than the sum of its proper divisors (13516238838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11563644042 is a wasteful number, since it uses less digits than its factorization.

11563644042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649258 (or 649255 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 11563644042 in words is "eleven billion, five hundred sixty-three million, six hundred forty-four thousand, forty-two".