161616056560605 has 32 divisors (see below), whose sum is σ = 295082769945600. Its totient is φ = 83865629347776.

The previous prime is 161616056560571. The next prime is 161616056560639. The reversal of 161616056560605 is 506065650616161.

161616056560605 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 16 + 0 + 5 + 6 + 560 + 60 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (161616056560571) and next prime (161616056560639).

It is not a de Polignac number, because 161616056560605 - 2⁹ = 161616056560093 is a prime.

It is a super-2 number, since 2×161616056560605² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16177778445 + ... + 16177788434.

It is an arithmetic number, because the mean of its divisors is an integer number (9221336560800).

Almost surely, 2^{161616056560605} is an apocalyptic number.

161616056560605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161616056560605 is a deficient number, since it is larger than the sum of its proper divisors (133466713384995).

161616056560605 is a wasteful number, since it uses less digits than its factorization.

161616056560605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32355566930 (or 32355566924 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 161616056560605 in words is "one hundred sixty-one trillion, six hundred sixteen billion, fifty-six million, five hundred sixty thousand, six hundred five".