161605560011589 has 96 divisors (see below), whose sum is σ = 251245166515200. Its totient is φ = 99871351050240.

The previous prime is 161605560011579. The next prime is 161605560011629. The reversal of 161605560011589 is 985110065506161.

161605560011589 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 5 + 56 + 0 + 0 + 1 + 1 + 589 = 666.

It is not a de Polignac number, because 161605560011589 - 2⁵ = 161605560011557 is a prime.

It is a super-2 number, since 2×161605560011589² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161605560011549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 562512622 + ... + 562799840.

It is an arithmetic number, because the mean of its divisors is an integer number (2617137151200).

Almost surely, 2^{161605560011589} is an apocalyptic number.

It is an amenable number.

161605560011589 is a deficient number, since it is larger than the sum of its proper divisors (89639606503611).

161605560011589 is a wasteful number, since it uses less digits than its factorization.

161605560011589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287835 (or 287832 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 54.

The spelling of 161605560011589 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred sixty million, eleven thousand, five hundred eighty-nine".