25123434445 has 16 divisors (see below), whose sum is σ = 32523839280. Its totient is φ = 18559550464.

The previous prime is 25123434433. The next prime is 25123434503. The reversal of 25123434445 is 54443432152.

It can be written as a sum of positive squares in 8 ways, for example, as 5461505604 + 19661928841 = 73902^2 + 140221^2 .

It is a cyclic number.

It is not a de Polignac number, because 25123434445 - 2²⁷ = 24989216717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2783890 + ... + 2792899.

It is an arithmetic number, because the mean of its divisors is an integer number (2032739955).

Almost surely, 2^25123434445 is an apocalyptic number.

It is an amenable number.

25123434445 is a deficient number, since it is larger than the sum of its proper divisors (7400404835).

25123434445 is a wasteful number, since it uses less digits than its factorization.

25123434445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576864.

The product of its digits is 230400, while the sum is 37.

Adding to 25123434445 its reverse (54443432152), we get a palindrome (79566866597).

The spelling of 25123434445 in words is "twenty-five billion, one hundred twenty-three million, four hundred thirty-four thousand, four hundred forty-five".