165456503 has 8 divisors (see below), whose sum is σ = 181737600. Its totient is φ = 149932728.

The previous prime is 165456493. The next prime is 165456509. The reversal of 165456503 is 305654561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165456503 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 not an unprimeable number, because it can be changed into a prime (165456509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188873 + ... + 189746.

It is an arithmetic number, because the mean of its divisors is an integer number (22717200).

Almost surely, 2^165456503 is an apocalyptic number.

165456503 is a deficient number, since it is larger than the sum of its proper divisors (16281097).

165456503 is a wasteful number, since it uses less digits than its factorization.

165456503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378661.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 165456503 is about 12862.9896602617. The cubic root of 165456503 is about 548.9860138463.

The spelling of 165456503 in words is "one hundred sixty-five million, four hundred fifty-six thousand, five hundred three".