13634521099 has 4 divisors (see below), whose sum is σ = 13703732064. Its totient is φ = 13565310136.

The previous prime is 13634521093. The next prime is 13634521123. The reversal of 13634521099 is 99012543631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13634521099 - 2⁹ = 13634520587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13634521093) 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, 34605187 + ... + 34605580.

It is an arithmetic number, because the mean of its divisors is an integer number (3425933016).

Almost surely, 2^13634521099 is an apocalyptic number.

13634521099 is a deficient number, since it is larger than the sum of its proper divisors (69210965).

13634521099 is an equidigital number, since it uses as much as digits as its factorization.

13634521099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69210964.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 13634521099 in words is "thirteen billion, six hundred thirty-four million, five hundred twenty-one thousand, ninety-nine".