161605560111084 has 36 divisors (see below), whose sum is σ = 408519167283136. Its totient is φ = 53866380652128.

The previous prime is 161605560111031. The next prime is 161605560111089. The reversal of 161605560111084 is 480111065506161.

161605560111084 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 5 + 560 + 1 + 1 + 1 + 0 + 84 = 666.

161605560111084 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161605560111084² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161605560111089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88221859 + ... + 90035034.

Almost surely, 2^{161605560111084} is an apocalyptic number.

It is an amenable number.

161605560111084 is an abundant number, since it is smaller than the sum of its proper divisors (246913607172052).

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

161605560111084 is a wasteful number, since it uses less digits than its factorization.

161605560111084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178282086 (or 178282081 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 161605560111084 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred sixty million, one hundred eleven thousand, eighty-four".