25345350909 has 6 divisors (see below), whose sum is σ = 36609951326. Its totient is φ = 16896900600.

The previous prime is 25345350829. The next prime is 25345350929. The reversal of 25345350909 is 90905354352.

25345350909 is a `hidden beast` number, since 25 + 3 + 4 + 535 + 0 + 90 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22306916025 + 3038434884 = 149355^2 + 55122^2 .

It is not a de Polignac number, because 25345350909 - 2¹⁶ = 25345285373 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 (25345350929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1408075042 + ... + 1408075059.

Almost surely, 2^25345350909 is an apocalyptic number.

It is an amenable number.

25345350909 is a deficient number, since it is larger than the sum of its proper divisors (11264600417).

25345350909 is a wasteful number, since it uses less digits than its factorization.

25345350909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816150107 (or 2816150104 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 45.

The spelling of 25345350909 in words is "twenty-five billion, three hundred forty-five million, three hundred fifty thousand, nine hundred nine".