1600561111161 has 16 divisors (see below), whose sum is σ = 2140855203200. Its totient is φ = 1063655763840.

The previous prime is 1600561111157. The next prime is 1600561111199. The reversal of 1600561111161 is 1611111650061.

It is not a de Polignac number, because 1600561111161 - 2² = 1600561111157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1600561111151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3191061 + ... + 3658413.

It is an arithmetic number, because the mean of its divisors is an integer number (133803450200).

Almost surely, 2^{1600561111161} is an apocalyptic number.

It is an amenable number.

1600561111161 is a deficient number, since it is larger than the sum of its proper divisors (540294092039).

1600561111161 is a wasteful number, since it uses less digits than its factorization.

1600561111161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470976.

The product of its (nonzero) digits is 1080, while the sum is 30.

The spelling of 1600561111161 in words is "one trillion, six hundred billion, five hundred sixty-one million, one hundred eleven thousand, one hundred sixty-one".