11809681916 has 12 divisors (see below), whose sum is σ = 21106665888. Its totient is φ = 5779205952.

The previous prime is 11809681879. The next prime is 11809681927. The reversal of 11809681916 is 61918690811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31408541 + ... + 31408916.

It is an arithmetic number, because the mean of its divisors is an integer number (1758888824).

Almost surely, 2^11809681916 is an apocalyptic number.

It is an amenable number.

11809681916 is a deficient number, since it is larger than the sum of its proper divisors (9296983972).

11809681916 is a wasteful number, since it uses less digits than its factorization.

11809681916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62817508 (or 62817506 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 50.

The spelling of 11809681916 in words is "eleven billion, eight hundred nine million, six hundred eighty-one thousand, nine hundred sixteen".