25445025845 has 4 divisors (see below), whose sum is σ = 30534031020. Its totient is φ = 20356020672.

The previous prime is 25445025829. The next prime is 25445025857. The reversal of 25445025845 is 54852054452.

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 15500748004 + 9944277841 = 124502^2 + 99721^2 .

It is a cyclic number.

It is not a de Polignac number, because 25445025845 - 2⁴ = 25445025829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25445025796 and 25445025805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2544502580 + ... + 2544502589.

It is an arithmetic number, because the mean of its divisors is an integer number (7633507755).

Almost surely, 2^25445025845 is an apocalyptic number.

It is an amenable number.

25445025845 is a deficient number, since it is larger than the sum of its proper divisors (5089005175).

25445025845 is an equidigital number, since it uses as much as digits as its factorization.

25445025845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089005174.

The product of its (nonzero) digits is 1280000, while the sum is 44.

The spelling of 25445025845 in words is "twenty-five billion, four hundred forty-five million, twenty-five thousand, eight hundred forty-five".