25554025563 has 32 divisors (see below), whose sum is σ = 37715963904. Its totient is φ = 15259860000.

The previous prime is 25554025559. The next prime is 25554025571. The reversal of 25554025563 is 36552045552.

It is not a de Polignac number, because 25554025563 - 2² = 25554025559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25554025513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6959218 + ... + 6962888.

It is an arithmetic number, because the mean of its divisors is an integer number (1178623872).

Almost surely, 2^25554025563 is an apocalyptic number.

25554025563 is a deficient number, since it is larger than the sum of its proper divisors (12161938341).

25554025563 is a wasteful number, since it uses less digits than its factorization.

25554025563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727.

The product of its (nonzero) digits is 900000, while the sum is 42.

The spelling of 25554025563 in words is "twenty-five billion, five hundred fifty-four million, twenty-five thousand, five hundred sixty-three".