13665504443 has 8 divisors (see below), whose sum is σ = 14079801216. Its totient is φ = 13257345600.

The previous prime is 13665504407. The next prime is 13665504473. The reversal of 13665504443 is 34440556631.

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 13665504443 - 2¹⁸ = 13665242299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13665504443.

It is not an unprimeable number, because it can be changed into a prime (13665504473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529963 + ... + 1538868.

It is an arithmetic number, because the mean of its divisors is an integer number (1759975152).

Almost surely, 2^13665504443 is an apocalyptic number.

13665504443 is a deficient number, since it is larger than the sum of its proper divisors (414296773).

13665504443 is an equidigital number, since it uses as much as digits as its factorization.

13665504443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068965.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 13665504443 in words is "thirteen billion, six hundred sixty-five million, five hundred four thousand, four hundred forty-three".