11686671813 has 4 divisors (see below), whose sum is σ = 15582229088. Its totient is φ = 7791114540.

The previous prime is 11686671809. The next prime is 11686671833. The reversal of 11686671813 is 31817668611.

11686671813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11686671813 - 2² = 11686671809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11686671833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947778633 + ... + 1947778638.

It is an arithmetic number, because the mean of its divisors is an integer number (3895557272).

Almost surely, 2^11686671813 is an apocalyptic number.

It is an amenable number.

11686671813 is a deficient number, since it is larger than the sum of its proper divisors (3895557275).

11686671813 is an equidigital number, since it uses as much as digits as its factorization.

11686671813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895557274.

The product of its digits is 290304, while the sum is 48.

The spelling of 11686671813 in words is "eleven billion, six hundred eighty-six million, six hundred seventy-one thousand, eight hundred thirteen".