1123456563 has 12 divisors (see below), whose sum is σ = 1627590328. Its totient is φ = 746746560.

The previous prime is 1123456561. The next prime is 1123456589. The reversal of 1123456563 is 3656543211.

1123456563 is a `hidden beast` number, since 1 + 1 + 2 + 34 + 565 + 63 = 666.

1123456563 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1123456563 - 2¹ = 1123456561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123456561) 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, 182173 + ... + 188238.

Almost surely, 2^1123456563 is an apocalyptic number.

1123456563 is a deficient number, since it is larger than the sum of its proper divisors (504133765).

1123456563 is a wasteful number, since it uses less digits than its factorization.

1123456563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370754 (or 370751 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1123456563 is about 33518.0035652483. The cubic root of 1123456563 is about 1039.5660674290.

Adding to 1123456563 its reverse (3656543211), we get a palindrome (4779999774).

The spelling of 1123456563 in words is "one billion, one hundred twenty-three million, four hundred fifty-six thousand, five hundred sixty-three".