13634521243 has 8 divisors (see below), whose sum is σ = 15585746688. Its totient is φ = 11684154984.

The previous prime is 13634521223. The next prime is 13634521253. The reversal of 13634521243 is 34212543631.

It is a happy number.

13634521243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13634521243 - 2⁵ = 13634521211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13634521199 and 13634521208.

It is not an unprimeable number, because it can be changed into a prime (13634521223) 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 7 ways as a sum of consecutive naturals, for example, 180421 + ... + 244582.

It is an arithmetic number, because the mean of its divisors is an integer number (1948218336).

Almost surely, 2^13634521243 is an apocalyptic number.

13634521243 is a deficient number, since it is larger than the sum of its proper divisors (1951225445).

13634521243 is an equidigital number, since it uses as much as digits as its factorization.

13634521243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429593.

The product of its digits is 51840, while the sum is 34.

The spelling of 13634521243 in words is "thirteen billion, six hundred thirty-four million, five hundred twenty-one thousand, two hundred forty-three".