13443975815 has 16 divisors (see below), whose sum is σ = 16176187776. Its totient is φ = 10726279200.

The previous prime is 13443975799. The next prime is 13443975827. The reversal of 13443975815 is 51857934431.

It is not a de Polignac number, because 13443975815 - 2⁴ = 13443975799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3762980 + ... + 3766550.

It is an arithmetic number, because the mean of its divisors is an integer number (1011011736).

Almost surely, 2^13443975815 is an apocalyptic number.

13443975815 is a deficient number, since it is larger than the sum of its proper divisors (2732211961).

13443975815 is a wasteful number, since it uses less digits than its factorization.

13443975815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390.

The product of its digits is 1814400, while the sum is 50.

The spelling of 13443975815 in words is "thirteen billion, four hundred forty-three million, nine hundred seventy-five thousand, eight hundred fifteen".