23563856441 has 4 divisors (see below), whose sum is σ = 23583810084. Its totient is φ = 23543902800.

The previous prime is 23563856413. The next prime is 23563856447. The reversal of 23563856441 is 14465836532.

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 11751427216 + 11812429225 = 108404^2 + 108685^2 .

It is a cyclic number.

It is not a de Polignac number, because 23563856441 - 2¹⁰ = 23563855417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23563856447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9975050 + ... + 9977411.

It is an arithmetic number, because the mean of its divisors is an integer number (5895952521).

Almost surely, 2^23563856441 is an apocalyptic number.

It is an amenable number.

23563856441 is a deficient number, since it is larger than the sum of its proper divisors (19953643).

23563856441 is a wasteful number, since it uses less digits than its factorization.

23563856441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19953642.

The product of its digits is 2073600, while the sum is 47.

The spelling of 23563856441 in words is "twenty-three billion, five hundred sixty-three million, eight hundred fifty-six thousand, four hundred forty-one".