165036565 has 12 divisors (see below), whose sum is σ = 209018124. Its totient is φ = 125078976.

The previous prime is 165036517. The next prime is 165036577. The reversal of 165036565 is 565630561.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37662769 + 127373796 = 6137^2 + 11286^2 .

It is not a de Polignac number, because 165036565 - 2⁷ = 165036437 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43912 + ... + 47521.

It is an arithmetic number, because the mean of its divisors is an integer number (17418177).

Almost surely, 2^165036565 is an apocalyptic number.

It is an amenable number.

165036565 is a deficient number, since it is larger than the sum of its proper divisors (43981559).

165036565 is an equidigital number, since it uses as much as digits as its factorization.

165036565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91476 (or 91457 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 165036565 is about 12846.6557905161. The cubic root of 165036565 is about 548.5211677966.

The spelling of 165036565 in words is "one hundred sixty-five million, thirty-six thousand, five hundred sixty-five".