12563440555 has 16 divisors (see below), whose sum is σ = 16001102880. Its totient is φ = 9436928512.

The previous prime is 12563440541. The next prime is 12563440567. The reversal of 12563440555 is 55504436521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12563440555 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140764 + ... + 211993.

It is an arithmetic number, because the mean of its divisors is an integer number (1000068930).

Almost surely, 2^12563440555 is an apocalyptic number.

12563440555 is a deficient number, since it is larger than the sum of its proper divisors (3437662325).

12563440555 is a wasteful number, since it uses less digits than its factorization.

12563440555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353198.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 12563440555 in words is "twelve billion, five hundred sixty-three million, four hundred forty thousand, five hundred fifty-five".