25555055500 has 48 divisors (see below), whose sum is σ = 60105505824. Its totient is φ = 9435710400.

The previous prime is 25555055497. The next prime is 25555055501. The reversal of 25555055500 is 555055552.

It is a self number, because there is not a number n which added to its sum of digits gives 25555055500.

It is not an unprimeable number, because it can be changed into a prime (25555055501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959274 + ... + 1972273.

It is an arithmetic number, because the mean of its divisors is an integer number (1252198038).

Almost surely, 2^25555055500 is an apocalyptic number.

25555055500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25555055500 is an abundant number, since it is smaller than the sum of its proper divisors (34550450324).

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

25555055500 is a wasteful number, since it uses less digits than its factorization.

25555055500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931579 (or 3931567 counting only the distinct ones).

The product of its (nonzero) digits is 156250, while the sum is 37.

The spelling of 25555055500 in words is "twenty-five billion, five hundred fifty-five million, fifty-five thousand, five hundred".