25555455 has 12 divisors (see below), whose sum is σ = 44296200. Its totient is φ = 13629552.

The previous prime is 25555441. The next prime is 25555463. The reversal of 25555455 is 55455552.

25555455 is a `hidden beast` number, since 2 + 55 + 554 + 55 = 666.

It is not a de Polignac number, because 25555455 - 2¹² = 25551359 is a prime.

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, 283905 + ... + 283994.

It is an arithmetic number, because the mean of its divisors is an integer number (3691350).

Almost surely, 2^25555455 is an apocalyptic number.

25555455 is a deficient number, since it is larger than the sum of its proper divisors (18740745).

25555455 is a wasteful number, since it uses less digits than its factorization.

25555455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567910 (or 567907 counting only the distinct ones).

The product of its digits is 125000, while the sum is 36.

The square root of 25555455 is about 5055.2403503691. The cubic root of 25555455 is about 294.5514777471.

The spelling of 25555455 in words is "twenty-five million, five hundred fifty-five thousand, four hundred fifty-five".