2456565563 has 4 divisors (see below), whose sum is σ = 2466844320. Its totient is φ = 2446286808.

The previous prime is 2456565541. The next prime is 2456565571. The reversal of 2456565563 is 3655656542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3655656542 = 2 ⋅1827828271.

It is a cyclic number.

It is not a de Polignac number, because 2456565563 - 2¹² = 2456561467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2456565583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5139020 + ... + 5139497.

It is an arithmetic number, because the mean of its divisors is an integer number (616711080).

Almost surely, 2^2456565563 is an apocalyptic number.

2456565563 is a deficient number, since it is larger than the sum of its proper divisors (10278757).

2456565563 is a wasteful number, since it uses less digits than its factorization.

2456565563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278756.

The product of its digits is 3240000, while the sum is 47.

The square root of 2456565563 is about 49563.7525112859. The cubic root of 2456565563 is about 1349.3028980772.

The spelling of 2456565563 in words is "two billion, four hundred fifty-six million, five hundred sixty-five thousand, five hundred sixty-three".