25555442256 has 60 divisors (see below), whose sum is σ = 71532782100. Its totient is φ = 8516928000.

The previous prime is 25555442249. The next prime is 25555442267. The reversal of 25555442256 is 65224455552.

25555442256 is a `hidden beast` number, since 2 + 5 + 5 + 554 + 42 + 2 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10204232256 + 15351210000 = 101016^2 + 123900^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 995470 + ... + 1020818.

It is an arithmetic number, because the mean of its divisors is an integer number (1192213035).

Almost surely, 2^25555442256 is an apocalyptic number.

It is an amenable number.

25555442256 is an abundant number, since it is smaller than the sum of its proper divisors (45977339844).

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

25555442256 is a wasteful number, since it uses less digits than its factorization.

25555442256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32364 (or 32355 counting only the distinct ones).

The product of its digits is 2400000, while the sum is 45.

The spelling of 25555442256 in words is "twenty-five billion, five hundred fifty-five million, four hundred forty-two thousand, two hundred fifty-six".