10561235563 has 4 divisors (see below), whose sum is σ = 10846674400. Its totient is φ = 10275796728.

The previous prime is 10561235537. The next prime is 10561235599. The reversal of 10561235563 is 36553216501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36553216501 = 281 ⋅130082621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10561235563 is a prime.

It is a super-2 number, since 2×10561235563² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 285438799 = 10561235563 / (1 + 0 + 5 + 6 + 1 + 2 + 3 + 5 + 5 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10561235513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142719363 + ... + 142719436.

It is an arithmetic number, because the mean of its divisors is an integer number (2711668600).

Almost surely, 2^10561235563 is an apocalyptic number.

10561235563 is a deficient number, since it is larger than the sum of its proper divisors (285438837).

10561235563 is an equidigital number, since it uses as much as digits as its factorization.

10561235563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285438836.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 10561235563 in words is "ten billion, five hundred sixty-one million, two hundred thirty-five thousand, five hundred sixty-three".