25089681109 has 4 divisors (see below), whose sum is σ = 25090038604. Its totient is φ = 25089323616.

The previous prime is 25089681091. The next prime is 25089681119. The reversal of 25089681109 is 90118698052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13191671025 + 11898010084 = 114855^2 + 109078^2 .

It is a cyclic number.

It is not a de Polignac number, because 25089681109 - 2¹⁵ = 25089648341 is a prime.

It is a super-2 number, since 2×25089681109² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25089681119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34872 + ... + 226705.

It is an arithmetic number, because the mean of its divisors is an integer number (6272509651).

Almost surely, 2^25089681109 is an apocalyptic number.

It is an amenable number.

25089681109 is a deficient number, since it is larger than the sum of its proper divisors (357495).

25089681109 is an equidigital number, since it uses as much as digits as its factorization.

25089681109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357494.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 25089681109 in words is "twenty-five billion, eighty-nine million, six hundred eighty-one thousand, one hundred nine".