25803553128 has 32 divisors (see below), whose sum is σ = 65001324960. Its totient is φ = 8535525440.

The previous prime is 25803553093. The next prime is 25803553157. The reversal of 25803553128 is 82135530852.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25803553128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4100475 + ... + 4106762.

It is an arithmetic number, because the mean of its divisors is an integer number (2031291405).

Almost surely, 2^25803553128 is an apocalyptic number.

It is an amenable number.

25803553128 is an abundant number, since it is smaller than the sum of its proper divisors (39197771832).

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

25803553128 is a wasteful number, since it uses less digits than its factorization.

25803553128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207377 (or 8207373 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 25803553128 in words is "twenty-five billion, eight hundred three million, five hundred fifty-three thousand, one hundred twenty-eight".