165943800223 has 16 divisors (see below), whose sum is σ = 168179484960. Its totient is φ = 163720656000.

The previous prime is 165943800167. The next prime is 165943800227. The reversal of 165943800223 is 322008349561.

165943800223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165943800223 - 2²¹ = 165941703071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165943800223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165943800227) 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 15 ways as a sum of consecutive naturals, for example, 63311853 + ... + 63314473.

It is an arithmetic number, because the mean of its divisors is an integer number (10511217810).

Almost surely, 2^165943800223 is an apocalyptic number.

165943800223 is a deficient number, since it is larger than the sum of its proper divisors (2235684737).

165943800223 is a wasteful number, since it uses less digits than its factorization.

165943800223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 165943800223 in words is "one hundred sixty-five billion, nine hundred forty-three million, eight hundred thousand, two hundred twenty-three".