25563704768 has 28 divisors (see below), whose sum is σ = 57974831472. Its totient is φ = 10955873280.

The previous prime is 25563704759. The next prime is 25563704791. The reversal of 25563704768 is 86740736552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28530473 + ... + 28531368.

Almost surely, 2^25563704768 is an apocalyptic number.

25563704768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25563704768 is an abundant number, since it is smaller than the sum of its proper divisors (32411126704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25563704768 is an equidigital number, since it uses as much as digits as its factorization.

25563704768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57061860 (or 57061850 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 25563704768 in words is "twenty-five billion, five hundred sixty-three million, seven hundred four thousand, seven hundred sixty-eight".