13404042815 has 4 divisors (see below), whose sum is σ = 16084851384. Its totient is φ = 10723234248.

The previous prime is 13404042809. The next prime is 13404042823. The reversal of 13404042815 is 51824040431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51824040431 = 701 ⋅73928731.

It is a cyclic number.

It is not a de Polignac number, because 13404042815 - 2¹⁸ = 13403780671 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 3 ways as a sum of consecutive naturals, for example, 1340404277 + ... + 1340404286.

It is an arithmetic number, because the mean of its divisors is an integer number (4021212846).

Almost surely, 2^13404042815 is an apocalyptic number.

13404042815 is a deficient number, since it is larger than the sum of its proper divisors (2680808569).

13404042815 is an equidigital number, since it uses as much as digits as its factorization.

13404042815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680808568.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 13404042815 in words is "thirteen billion, four hundred four million, forty-two thousand, eight hundred fifteen".