161652065 has 16 divisors (see below), whose sum is σ = 206599248. Its totient is φ = 120999936.

The previous prime is 161652059. The next prime is 161652083. The reversal of 161652065 is 560256161.

It can be written as a sum of positive squares in 8 ways, for example, as 2917264 + 158734801 = 1708^2 + 12599^2 .

It is a cyclic number.

It is not a de Polignac number, because 161652065 - 2¹⁴ = 161635681 is a prime.

It is a super-2 number, since 2×161652065² = 52262780237528450, which contains 22 as substring.

It is a Duffinian 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, 9209 + ... + 20201.

It is an arithmetic number, because the mean of its divisors is an integer number (12912453).

Almost surely, 2^161652065 is an apocalyptic number.

It is an amenable number.

161652065 is a deficient number, since it is larger than the sum of its proper divisors (44947183).

161652065 is a wasteful number, since it uses less digits than its factorization.

161652065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11188.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 161652065 is about 12714.2465368578. The cubic root of 161652065 is about 544.7456265998.

The spelling of 161652065 in words is "one hundred sixty-one million, six hundred fifty-two thousand, sixty-five".