111165454161 has 32 divisors (see below), whose sum is σ = 168802819200. Its totient is φ = 72281246400.

The previous prime is 111165454159. The next prime is 111165454229. The reversal of 111165454161 is 161454561111.

111165454161 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 6 + 54 + 541 + 61 = 666.

It is not a de Polignac number, because 111165454161 - 2¹ = 111165454159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111165454061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121506 + ... + 486923.

It is an arithmetic number, because the mean of its divisors is an integer number (5275088100).

Almost surely, 2^111165454161 is an apocalyptic number.

It is an amenable number.

111165454161 is a deficient number, since it is larger than the sum of its proper divisors (57637365039).

111165454161 is a wasteful number, since it uses less digits than its factorization.

111165454161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608606 (or 608600 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The spelling of 111165454161 in words is "one hundred eleven billion, one hundred sixty-five million, four hundred fifty-four thousand, one hundred sixty-one".