165040636 has 24 divisors (see below), whose sum is σ = 293660640. Its totient is φ = 81144000.

The previous prime is 165040633. The next prime is 165040649. The reversal of 165040636 is 636040561.

It is a junction number, because it is equal to n+sod(n) for n = 165040598 and 165040607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165040633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198670 + ... + 199498.

It is an arithmetic number, because the mean of its divisors is an integer number (12235860).

Almost surely, 2^165040636 is an apocalyptic number.

It is an amenable number.

165040636 is a deficient number, since it is larger than the sum of its proper divisors (128620004).

165040636 is a wasteful number, since it uses less digits than its factorization.

165040636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 165040636 is about 12846.8142354437. The cubic root of 165040636 is about 548.5256779311.

The spelling of 165040636 in words is "one hundred sixty-five million, forty thousand, six hundred thirty-six".