2563609563 has 6 divisors (see below), whose sum is σ = 3702991604. Its totient is φ = 1709073036.

The previous prime is 2563609481. The next prime is 2563609579. The reversal of 2563609563 is 3659063652.

2563609563 is a `hidden beast` number, since 2 + 5 + 636 + 0 + 9 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 2563609563 - 2¹⁸ = 2563347419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2563609063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142422745 + ... + 142422762.

Almost surely, 2^2563609563 is an apocalyptic number.

2563609563 is a deficient number, since it is larger than the sum of its proper divisors (1139382041).

2563609563 is a wasteful number, since it uses less digits than its factorization.

2563609563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284845513 (or 284845510 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 45.

The square root of 2563609563 is about 50632.1001243282. The cubic root of 2563609563 is about 1368.6233997625.

The spelling of 2563609563 in words is "two billion, five hundred sixty-three million, six hundred nine thousand, five hundred sixty-three".