11808685161 has 48 divisors (see below), whose sum is σ = 21560657664. Its totient is φ = 6060396672.

The previous prime is 11808685159. The next prime is 11808685177. The reversal of 11808685161 is 16158680811.

It is a happy number.

It is not a de Polignac number, because 11808685161 - 2¹ = 11808685159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11808685111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164541 + ... + 225146.

It is an arithmetic number, because the mean of its divisors is an integer number (449180368).

Almost surely, 2^11808685161 is an apocalyptic number.

It is an amenable number.

11808685161 is a deficient number, since it is larger than the sum of its proper divisors (9751972503).

11808685161 is a wasteful number, since it uses less digits than its factorization.

11808685161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389750 (or 389747 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 11808685161 in words is "eleven billion, eight hundred eight million, six hundred eighty-five thousand, one hundred sixty-one".