12563818881 has 8 divisors (see below), whose sum is σ = 16760681280. Its totient is φ = 8371417872.

The previous prime is 12563818853. The next prime is 12563818909. The reversal of 12563818881 is 18881836521.

12563818881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12563818853) and next prime (12563818909).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12563818881 - 2¹⁷ = 12563687809 is a prime.

It is a super-2 number, since 2×12563818881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12563818801) 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 7 ways as a sum of consecutive naturals, for example, 1108770 + ... + 1120043.

It is an arithmetic number, because the mean of its divisors is an integer number (2095085160).

Almost surely, 2^12563818881 is an apocalyptic number.

It is an amenable number.

12563818881 is a deficient number, since it is larger than the sum of its proper divisors (4196862399).

12563818881 is a wasteful number, since it uses less digits than its factorization.

12563818881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230695.

The product of its digits is 737280, while the sum is 51.

The spelling of 12563818881 in words is "twelve billion, five hundred sixty-three million, eight hundred eighteen thousand, eight hundred eighty-one".