13544340321 has 4 divisors (see below), whose sum is σ = 18059120432. Its totient is φ = 9029560212.

The previous prime is 13544340289. The next prime is 13544340343. The reversal of 13544340321 is 12304344531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13544340321 - 2⁵ = 13544340289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13544340371) 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, 2257390051 + ... + 2257390056.

It is an arithmetic number, because the mean of its divisors is an integer number (4514780108).

Almost surely, 2^13544340321 is an apocalyptic number.

It is an amenable number.

13544340321 is a deficient number, since it is larger than the sum of its proper divisors (4514780111).

13544340321 is an equidigital number, since it uses as much as digits as its factorization.

13544340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514780110.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 13544340321 its reverse (12304344531), we get a palindrome (25848684852).

The spelling of 13544340321 in words is "thirteen billion, five hundred forty-four million, three hundred forty thousand, three hundred twenty-one".