25453249999 has 4 divisors (see below), whose sum is σ = 25586513280. Its totient is φ = 25319986720.

The previous prime is 25453249993. The next prime is 25453250027. The reversal of 25453249999 is 99994235452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25453249999 - 2¹⁷ = 25453118927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25453249993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66631354 + ... + 66631735.

It is an arithmetic number, because the mean of its divisors is an integer number (6396628320).

Almost surely, 2^25453249999 is an apocalyptic number.

25453249999 is a deficient number, since it is larger than the sum of its proper divisors (133263281).

25453249999 is a wasteful number, since it uses less digits than its factorization.

25453249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133263280.

The product of its digits is 31492800, while the sum is 61.

The spelling of 25453249999 in words is "twenty-five billion, four hundred fifty-three million, two hundred forty-nine thousand, nine hundred ninety-nine".