25253545309 has 2 divisors, whose sum is σ = 25253545310. Its totient is φ = 25253545308.

The previous prime is 25253545301. The next prime is 25253545333. The reversal of 25253545309 is 90354535252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15137611225 + 10115934084 = 123035^2 + 100578^2 .

It is a cyclic number.

It is not a de Polignac number, because 25253545309 - 2³ = 25253545301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25253545301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12626772654 + 12626772655.

It is an arithmetic number, because the mean of its divisors is an integer number (12626772655).

Almost surely, 2^25253545309 is an apocalyptic number.

It is an amenable number.

25253545309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25253545309 is an equidigital number, since it uses as much as digits as its factorization.

25253545309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810000, while the sum is 43.

The spelling of 25253545309 in words is "twenty-five billion, two hundred fifty-three million, five hundred forty-five thousand, three hundred nine".