13540608013109 has 4 divisors (see below), whose sum is σ = 13540769754540. Its totient is φ = 13540446271680.

The previous prime is 13540608013081. The next prime is 13540608013117. The reversal of 13540608013109 is 90131080604531.

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 10292964310225 + 3247643702884 = 3208265^2 + 1802122^2 .

It is a cyclic number.

It is not a de Polignac number, because 13540608013109 - 2⁸ = 13540608012853 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 (13540608013139) 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, 80745074 + ... + 80912595.

It is an arithmetic number, because the mean of its divisors is an integer number (3385192438635).

Almost surely, 2^{13540608013109} is an apocalyptic number.

It is an amenable number.

13540608013109 is a deficient number, since it is larger than the sum of its proper divisors (161741431).

13540608013109 is an equidigital number, since it uses as much as digits as its factorization.

13540608013109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161741430.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 13540608013109 in words is "thirteen trillion, five hundred forty billion, six hundred eight million, thirteen thousand, one hundred nine".