11945664911 has 4 divisors (see below), whose sum is σ = 11953090800. Its totient is φ = 11938239024.

The previous prime is 11945664893. The next prime is 11945664917. The reversal of 11945664911 is 11946654911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11945664911 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 (11945664917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3710531 + ... + 3713748.

It is an arithmetic number, because the mean of its divisors is an integer number (2988272700).

Almost surely, 2^11945664911 is an apocalyptic number.

11945664911 is a deficient number, since it is larger than the sum of its proper divisors (7425889).

11945664911 is an equidigital number, since it uses as much as digits as its factorization.

11945664911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7425888.

The product of its digits is 233280, while the sum is 47.

The spelling of 11945664911 in words is "eleven billion, nine hundred forty-five million, six hundred sixty-four thousand, nine hundred eleven".