165016844509 has 8 divisors (see below), whose sum is σ = 180028707840. Its totient is φ = 150006703200.

The previous prime is 165016844507. The next prime is 165016844513. The reversal of 165016844509 is 905448610561.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 165016844509 - 2¹ = 165016844507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165016844507) 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, 225904 + ... + 617305.

It is an arithmetic number, because the mean of its divisors is an integer number (22503588480).

Almost surely, 2^165016844509 is an apocalyptic number.

It is an amenable number.

165016844509 is a deficient number, since it is larger than the sum of its proper divisors (15011863331).

165016844509 is a wasteful number, since it uses less digits than its factorization.

165016844509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861011.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 165016844509 in words is "one hundred sixty-five billion, sixteen million, eight hundred forty-four thousand, five hundred nine".