11646911813 has 4 divisors (see below), whose sum is σ = 11675388780. Its totient is φ = 11618434848.

The previous prime is 11646911797. The next prime is 11646911819. The reversal of 11646911813 is 31811964611.

11646911813 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4797363169 + 6849548644 = 69263^2 + 82762^2 .

It is a cyclic number.

It is not a de Polignac number, because 11646911813 - 2⁴ = 11646911797 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 (11646911819) 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, 14237870 + ... + 14238687.

It is an arithmetic number, because the mean of its divisors is an integer number (2918847195).

Almost surely, 2^11646911813 is an apocalyptic number.

It is an amenable number.

11646911813 is a deficient number, since it is larger than the sum of its proper divisors (28476967).

11646911813 is an equidigital number, since it uses as much as digits as its factorization.

11646911813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28476966.

The product of its digits is 31104, while the sum is 41.

The spelling of 11646911813 in words is "eleven billion, six hundred forty-six million, nine hundred eleven thousand, eight hundred thirteen".