161065205 has 48 divisors (see below), whose sum is σ = 237769344. Its totient is φ = 104227200.

The previous prime is 161065189. The next prime is 161065213. The reversal of 161065205 is 502560161.

It is not a de Polignac number, because 161065205 - 2⁴ = 161065189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 568994 + ... + 569276.

It is an arithmetic number, because the mean of its divisors is an integer number (4953528).

Almost surely, 2^161065205 is an apocalyptic number.

It is an amenable number.

161065205 is a deficient number, since it is larger than the sum of its proper divisors (76704139).

161065205 is a wasteful number, since it uses less digits than its factorization.

161065205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 161065205 is about 12691.1467172986. The cubic root of 161065205 is about 544.0856142737.

The spelling of 161065205 in words is "one hundred sixty-one million, sixty-five thousand, two hundred five".