12056561563 has 4 divisors (see below), whose sum is σ = 12144565800. Its totient is φ = 11968557328.

The previous prime is 12056561527. The next prime is 12056561593. The reversal of 12056561563 is 36516565021.

12056561563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36516565021 = 4463 ⋅8182067.

It is a cyclic number.

It is not a de Polignac number, because 12056561563 - 2⁹ = 12056561051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12056561593) 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 3 ways as a sum of consecutive naturals, for example, 44001913 + ... + 44002186.

It is an arithmetic number, because the mean of its divisors is an integer number (3036141450).

Almost surely, 2^12056561563 is an apocalyptic number.

12056561563 is a deficient number, since it is larger than the sum of its proper divisors (88004237).

12056561563 is an equidigital number, since it uses as much as digits as its factorization.

12056561563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88004236.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 12056561563 in words is "twelve billion, fifty-six million, five hundred sixty-one thousand, five hundred sixty-three".