13815318811 has 4 divisors (see below), whose sum is σ = 15788935792. Its totient is φ = 11841701832.

The previous prime is 13815318773. The next prime is 13815318871. The reversal of 13815318811 is 11881351831.

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 13815318811 - 2¹¹ = 13815316763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13815318871) 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, 986808480 + ... + 986808493.

It is an arithmetic number, because the mean of its divisors is an integer number (3947233948).

Almost surely, 2^13815318811 is an apocalyptic number.

13815318811 is a deficient number, since it is larger than the sum of its proper divisors (1973616981).

13815318811 is an equidigital number, since it uses as much as digits as its factorization.

13815318811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973616980.

The product of its digits is 23040, while the sum is 40.

The spelling of 13815318811 in words is "thirteen billion, eight hundred fifteen million, three hundred eighteen thousand, eight hundred eleven".