2563540563 has 4 divisors (see below), whose sum is σ = 3418054088. Its totient is φ = 1709027040.

The previous prime is 2563540549. The next prime is 2563540607. The reversal of 2563540563 is 3650453652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2563540563 - 2⁴ = 2563540547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2563540513) 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, 427256758 + ... + 427256763.

It is an arithmetic number, because the mean of its divisors is an integer number (854513522).

Almost surely, 2^2563540563 is an apocalyptic number.

2563540563 is a deficient number, since it is larger than the sum of its proper divisors (854513525).

2563540563 is an equidigital number, since it uses as much as digits as its factorization.

2563540563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854513524.

The product of its (nonzero) digits is 324000, while the sum is 39.

The square root of 2563540563 is about 50631.4187338257. The cubic root of 2563540563 is about 1368.6111207396.

The spelling of 2563540563 in words is "two billion, five hundred sixty-three million, five hundred forty thousand, five hundred sixty-three".