25256307145 has 4 divisors (see below), whose sum is σ = 30307568580. Its totient is φ = 20205045712.

The previous prime is 25256307119. The next prime is 25256307151. The reversal of 25256307145 is 54170365252.

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 5994475776 + 19261831369 = 77424^2 + 138787^2 .

It is a cyclic number.

It is not a de Polignac number, because 25256307145 - 2⁵ = 25256307113 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 25256307098 and 25256307107.

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, 2525630710 + ... + 2525630719.

It is an arithmetic number, because the mean of its divisors is an integer number (7576892145).

Almost surely, 2^25256307145 is an apocalyptic number.

It is an amenable number.

25256307145 is a deficient number, since it is larger than the sum of its proper divisors (5051261435).

25256307145 is an equidigital number, since it uses as much as digits as its factorization.

25256307145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051261434.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 25256307145 in words is "twenty-five billion, two hundred fifty-six million, three hundred seven thousand, one hundred forty-five".