161962065 has 16 divisors (see below), whose sum is σ = 287932800. Its totient is φ = 86379696.

The previous prime is 161962057. The next prime is 161962091. The reversal of 161962065 is 560269161.

161962065 is a `hidden beast` number, since 16 + 19 + 620 + 6 + 5 = 666.

It is not a de Polignac number, because 161962065 - 2³ = 161962057 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599725 + ... + 599994.

It is an arithmetic number, because the mean of its divisors is an integer number (17995800).

Almost surely, 2^161962065 is an apocalyptic number.

161962065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161962065 is a deficient number, since it is larger than the sum of its proper divisors (125970735).

161962065 is a wasteful number, since it uses less digits than its factorization.

161962065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199733 (or 1199727 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 161962065 is about 12726.4317465659. The cubic root of 161962065 is about 545.0936236207.

The spelling of 161962065 in words is "one hundred sixty-one million, nine hundred sixty-two thousand, sixty-five".