25642655055 has 16 divisors (see below), whose sum is σ = 45586942560. Its totient is φ = 13676082624.

The previous prime is 25642655039. The next prime is 25642655069. The reversal of 25642655055 is 55055624652.

25642655055 is a `hidden beast` number, since 2 + 5 + 6 + 42 + 6 + 550 + 55 = 666.

It is not a de Polignac number, because 25642655055 - 2⁴ = 25642655039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25642655055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94972662 + ... + 94972931.

It is an arithmetic number, because the mean of its divisors is an integer number (2849183910).

Almost surely, 2^25642655055 is an apocalyptic number.

25642655055 is a deficient number, since it is larger than the sum of its proper divisors (19944287505).

25642655055 is a wasteful number, since it uses less digits than its factorization.

25642655055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189945607 (or 189945601 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 25642655055 in words is "twenty-five billion, six hundred forty-two million, six hundred fifty-five thousand, fifty-five".