25956109 has 12 divisors (see below), whose sum is σ = 27814720. Its totient is φ = 24154200.

The previous prime is 25956089. The next prime is 25956149. The reversal of 25956109 is 90165952.

It is not a de Polignac number, because 25956109 - 2⁹ = 25955597 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 (25956149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95644 + ... + 95914.

Almost surely, 2^25956109 is an apocalyptic number.

It is an amenable number.

25956109 is a deficient number, since it is larger than the sum of its proper divisors (1858611).

25956109 is an equidigital number, since it uses as much as digits as its factorization.

25956109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 25956109 is about 5094.7138290585. The cubic root of 25956109 is about 296.0828117761.

The spelling of 25956109 in words is "twenty-five million, nine hundred fifty-six thousand, one hundred nine".