25563364263 has 8 divisors (see below), whose sum is σ = 37871650800. Its totient is φ = 17042242824.

The previous prime is 25563364259. The next prime is 25563364271. The reversal of 25563364263 is 36246336552.

25563364263 is a `hidden beast` number, since 2 + 5 + 5 + 633 + 6 + 4 + 2 + 6 + 3 = 666.

It is not a de Polignac number, because 25563364263 - 2² = 25563364259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563364223) 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, 473395608 + ... + 473395661.

It is an arithmetic number, because the mean of its divisors is an integer number (4733956350).

Almost surely, 2^25563364263 is an apocalyptic number.

25563364263 is a deficient number, since it is larger than the sum of its proper divisors (12308286537).

25563364263 is an equidigital number, since it uses as much as digits as its factorization.

25563364263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946791278 (or 946791272 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 45.

The spelling of 25563364263 in words is "twenty-five billion, five hundred sixty-three million, three hundred sixty-four thousand, two hundred sixty-three".