12563638514 has 24 divisors (see below), whose sum is σ = 21926219868. Its totient is φ = 5383445760.

The previous prime is 12563638511. The next prime is 12563638517. The reversal of 12563638514 is 41583636521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12563638511) and next prime (12563638517).

It can be written as a sum of positive squares in 2 ways, for example, as 11298627025 + 1265011489 = 106295^2 + 35567^2 .

It is not an unprimeable number, because it can be changed into a prime (12563638511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 898682 + ... + 912554.

Almost surely, 2^12563638514 is an apocalyptic number.

12563638514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12563638514 is a deficient number, since it is larger than the sum of its proper divisors (9362581354).

12563638514 is a wasteful number, since it uses less digits than its factorization.

12563638514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23130 (or 23123 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 12563638514 in words is "twelve billion, five hundred sixty-three million, six hundred thirty-eight thousand, five hundred fourteen".