2563566263 has 2 divisors, whose sum is σ = 2563566264. Its totient is φ = 2563566262.

The previous prime is 2563566259. The next prime is 2563566281. The reversal of 2563566263 is 3626653652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2563566263 - 2² = 2563566259 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563566293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281783131 + 1281783132.

It is an arithmetic number, because the mean of its divisors is an integer number (1281783132).

Almost surely, 2^2563566263 is an apocalyptic number.

2563566263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563566263 is an equidigital number, since it uses as much as digits as its factorization.

2563566263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 44.

The square root of 2563566263 is about 50631.6725281715. The cubic root of 2563566263 is about 1368.6156942565.

The spelling of 2563566263 in words is "two billion, five hundred sixty-three million, five hundred sixty-six thousand, two hundred sixty-three".