11505161166 has 16 divisors (see below), whose sum is σ = 23012640000. Its totient is φ = 3834667448.

The previous prime is 11505161149. The next prime is 11505161191. The reversal of 11505161166 is 66116150511.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28326 + ... + 154313.

It is an arithmetic number, because the mean of its divisors is an integer number (1438290000).

Almost surely, 2^11505161166 is an apocalyptic number.

11505161166 is an abundant number, since it is smaller than the sum of its proper divisors (11507478834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11505161166 is a wasteful number, since it uses less digits than its factorization.

11505161166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193143.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 11505161166 in words is "eleven billion, five hundred five million, one hundred sixty-one thousand, one hundred sixty-six".