25255005305 has 4 divisors (see below), whose sum is σ = 30306006372. Its totient is φ = 20204004240.

The previous prime is 25255005289. The next prime is 25255005311. The reversal of 25255005305 is 50350055252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7933286761 + 17321718544 = 89069^2 + 131612^2 .

It is not a de Polignac number, because 25255005305 - 2⁴ = 25255005289 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2525500526 + ... + 2525500535.

It is an arithmetic number, because the mean of its divisors is an integer number (7576501593).

Almost surely, 2^25255005305 is an apocalyptic number.

It is an amenable number.

25255005305 is a deficient number, since it is larger than the sum of its proper divisors (5051001067).

25255005305 is an equidigital number, since it uses as much as digits as its factorization.

25255005305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051001066.

The product of its (nonzero) digits is 37500, while the sum is 32.

The spelling of 25255005305 in words is "twenty-five billion, two hundred fifty-five million, five thousand, three hundred five".