12563336551 has 24 divisors (see below), whose sum is σ = 13312555200. Its totient is φ = 11850402240.

The previous prime is 12563336543. The next prime is 12563336561. The reversal of 12563336551 is 15563336521.

It is not a de Polignac number, because 12563336551 - 2³ = 12563336543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563336561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15762885 + ... + 15763681.

It is an arithmetic number, because the mean of its divisors is an integer number (554689800).

Almost surely, 2^12563336551 is an apocalyptic number.

12563336551 is a deficient number, since it is larger than the sum of its proper divisors (749218649).

12563336551 is an equidigital number, since it uses as much as digits as its factorization.

12563336551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1224 counting only the distinct ones).

The product of its digits is 243000, while the sum is 40.

The spelling of 12563336551 in words is "twelve billion, five hundred sixty-three million, three hundred thirty-six thousand, five hundred fifty-one".