165064559 has 4 divisors (see below), whose sum is σ = 180070440. Its totient is φ = 150058680.

The previous prime is 165064531. The next prime is 165064591. The reversal of 165064559 is 955460561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165064559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165060559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7502924 + ... + 7502945.

It is an arithmetic number, because the mean of its divisors is an integer number (45017610).

Almost surely, 2^165064559 is an apocalyptic number.

165064559 is a deficient number, since it is larger than the sum of its proper divisors (15005881).

165064559 is a wasteful number, since it uses less digits than its factorization.

165064559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15005880.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 165064559 is about 12847.7452885711. The cubic root of 165064559 is about 548.5521799816.

The spelling of 165064559 in words is "one hundred sixty-five million, sixty-four thousand, five hundred fifty-nine".