25235726510509 has 2 divisors, whose sum is σ = 25235726510510. Its totient is φ = 25235726510508.

The previous prime is 25235726510473. The next prime is 25235726510563. The reversal of 25235726510509 is 90501562753252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18967087634884 + 6268638875625 = 4355122^2 + 2503725^2 .

It is a cyclic number.

It is not a de Polignac number, because 25235726510509 - 2³³ = 25227136575917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25235726210509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617863255254 + 12617863255255.

It is an arithmetic number, because the mean of its divisors is an integer number (12617863255255).

Almost surely, 2^{25235726510509} is an apocalyptic number.

It is an amenable number.

25235726510509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25235726510509 is an equidigital number, since it uses as much as digits as its factorization.

25235726510509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 25235726510509 in words is "twenty-five trillion, two hundred thirty-five billion, seven hundred twenty-six million, five hundred ten thousand, five hundred nine".