2565036563 has 8 divisors (see below), whose sum is σ = 2576813568. Its totient is φ = 2553280704.

The previous prime is 2565036491. The next prime is 2565036571. The reversal of 2565036563 is 3656305652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2565036563 - 2⁸ = 2565036307 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565036563.

It is not an unprimeable number, because it can be changed into a prime (2565036583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269870 + ... + 279212.

It is an arithmetic number, because the mean of its divisors is an integer number (322101696).

Almost surely, 2^2565036563 is an apocalyptic number.

2565036563 is a deficient number, since it is larger than the sum of its proper divisors (11777005).

2565036563 is an equidigital number, since it uses as much as digits as its factorization.

2565036563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573.

The product of its (nonzero) digits is 486000, while the sum is 41.

The square root of 2565036563 is about 50646.1900146497. The cubic root of 2565036563 is about 1368.8772948117.

The spelling of 2565036563 in words is "two billion, five hundred sixty-five million, thirty-six thousand, five hundred sixty-three".