26310138109 has 12 divisors (see below), whose sum is σ = 27796557564. Its totient is φ = 24899548032.

The previous prime is 26310138073. The next prime is 26310138121. The reversal of 26310138109 is 90183101362.

It can be written as a sum of positive squares in 2 ways, for example, as 24659991225 + 1650146884 = 157035^2 + 40622^2 .

It is not a de Polignac number, because 26310138109 - 2⁷ = 26310137981 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 (26310138199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315399 + ... + 389995.

It is an arithmetic number, because the mean of its divisors is an integer number (2316379797).

Almost surely, 2^26310138109 is an apocalyptic number.

It is an amenable number.

26310138109 is a deficient number, since it is larger than the sum of its proper divisors (1486419455).

26310138109 is an equidigital number, since it uses as much as digits as its factorization.

26310138109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75612 (or 75593 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 26310138109 in words is "twenty-six billion, three hundred ten million, one hundred thirty-eight thousand, one hundred nine".