25753261909 has 2 divisors, whose sum is σ = 25753261910. Its totient is φ = 25753261908.

The previous prime is 25753261901. The next prime is 25753261913. The reversal of 25753261909 is 90916235752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18633615025 + 7119646884 = 136505^2 + 84378^2 .

It is a cyclic number.

It is not a de Polignac number, because 25753261909 - 2³ = 25753261901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25753261901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12876630954 + 12876630955.

It is an arithmetic number, because the mean of its divisors is an integer number (12876630955).

Almost surely, 2^25753261909 is an apocalyptic number.

It is an amenable number.

25753261909 is a deficient number, since it is larger than the sum of its proper divisors (1).

25753261909 is an equidigital number, since it uses as much as digits as its factorization.

25753261909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 25753261909 in words is "twenty-five billion, seven hundred fifty-three million, two hundred sixty-one thousand, nine hundred nine".