161511065116 has 12 divisors (see below), whose sum is σ = 282789397800. Its totient is φ = 80714094320.

The previous prime is 161511065099. The next prime is 161511065137. The reversal of 161511065116 is 611560115161.

161511065116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 10350790 + ... + 10366381.

It is an arithmetic number, because the mean of its divisors is an integer number (23565783150).

Almost surely, 2^161511065116 is an apocalyptic number.

It is an amenable number.

161511065116 is a deficient number, since it is larger than the sum of its proper divisors (121278332684).

161511065116 is a wasteful number, since it uses less digits than its factorization.

161511065116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20719124 (or 20719122 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 161511065116 in words is "one hundred sixty-one billion, five hundred eleven million, sixty-five thousand, one hundred sixteen".