12563818853 has 2 divisors, whose sum is σ = 12563818854. Its totient is φ = 12563818852.

The previous prime is 12563818847. The next prime is 12563818909. The reversal of 12563818853 is 35881836521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11222647969 + 1341170884 = 105937^2 + 36622^2 .

It is a cyclic number.

It is not a de Polignac number, because 12563818853 - 2¹⁴ = 12563802469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12563818843) 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 as a sum of consecutive naturals, namely, 6281909426 + 6281909427.

It is an arithmetic number, because the mean of its divisors is an integer number (6281909427).

Almost surely, 2^12563818853 is an apocalyptic number.

It is an amenable number.

12563818853 is a deficient number, since it is larger than the sum of its proper divisors (1).

12563818853 is an equidigital number, since it uses as much as digits as its factorization.

12563818853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 50.

The spelling of 12563818853 in words is "twelve billion, five hundred sixty-three million, eight hundred eighteen thousand, eight hundred fifty-three".