12563440556 has 24 divisors (see below), whose sum is σ = 22721147904. Its totient is φ = 6072146640.

The previous prime is 12563440541. The next prime is 12563440567. The reversal of 12563440556 is 65504436521.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52121 + ... + 166863.

It is an arithmetic number, because the mean of its divisors is an integer number (946714496).

Almost surely, 2^12563440556 is an apocalyptic number.

It is an amenable number.

12563440556 is a deficient number, since it is larger than the sum of its proper divisors (10157707348).

12563440556 is a wasteful number, since it uses less digits than its factorization.

12563440556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115661 (or 115659 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 12563440556 in words is "twelve billion, five hundred sixty-three million, four hundred forty thousand, five hundred fifty-six".