25923808345 has 4 divisors (see below), whose sum is σ = 31108570020. Its totient is φ = 20739046672.

The previous prime is 25923808343. The next prime is 25923808349. The reversal of 25923808345 is 54380832952.

It is a happy number.

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 15691069696 + 10232738649 = 125264^2 + 101157^2 .

It is a cyclic number.

It is not a de Polignac number, because 25923808345 - 2¹ = 25923808343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25923808343) by changing a digit.

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, 2592380830 + ... + 2592380839.

It is an arithmetic number, because the mean of its divisors is an integer number (7777142505).

Almost surely, 2^25923808345 is an apocalyptic number.

It is an amenable number.

25923808345 is a deficient number, since it is larger than the sum of its proper divisors (5184761675).

25923808345 is an equidigital number, since it uses as much as digits as its factorization.

25923808345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184761674.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 25923808345 in words is "twenty-five billion, nine hundred twenty-three million, eight hundred eight thousand, three hundred forty-five".