25254315985 has 4 divisors (see below), whose sum is σ = 30305179188. Its totient is φ = 20203452784.

The previous prime is 25254315967. The next prime is 25254316019. The reversal of 25254315985 is 58951345252.

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 12868406721 + 12385909264 = 113439^2 + 111292^2 .

It is a cyclic number.

It is not a de Polignac number, because 25254315985 - 2²¹ = 25252218833 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 2525431594 + ... + 2525431603.

It is an arithmetic number, because the mean of its divisors is an integer number (7576294797).

Almost surely, 2^25254315985 is an apocalyptic number.

It is an amenable number.

25254315985 is a deficient number, since it is larger than the sum of its proper divisors (5050863203).

25254315985 is an equidigital number, since it uses as much as digits as its factorization.

25254315985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050863202.

The product of its digits is 2160000, while the sum is 49.

The spelling of 25254315985 in words is "twenty-five billion, two hundred fifty-four million, three hundred fifteen thousand, nine hundred eighty-five".