1123258563 has 16 divisors (see below), whose sum is σ = 1901813760. Its totient is φ = 641861928.

The previous prime is 1123258559. The next prime is 1123258639. The reversal of 1123258563 is 3658523211.

1123258563 is a `hidden beast` number, since 1 + 12 + 3 + 2 + 585 + 63 = 666.

It is not a de Polignac number, because 1123258563 - 2² = 1123258559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123258523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2971395 + ... + 2971772.

It is an arithmetic number, because the mean of its divisors is an integer number (118863360).

Almost surely, 2^1123258563 is an apocalyptic number.

1123258563 is a deficient number, since it is larger than the sum of its proper divisors (778555197).

1123258563 is an equidigital number, since it uses as much as digits as its factorization.

1123258563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943183 (or 5943177 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1123258563 is about 33515.0497985606. The cubic root of 1123258563 is about 1039.5049921780.

The spelling of 1123258563 in words is "one billion, one hundred twenty-three million, two hundred fifty-eight thousand, five hundred sixty-three".