165603242023 has 8 divisors (see below), whose sum is σ = 166314314192. Its totient is φ = 164893470336.

The previous prime is 165603242017. The next prime is 165603242027. The reversal of 165603242023 is 320242306561.

165603242023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165603242023 - 2⁹ = 165603241511 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 165603242023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165603242027) 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 7 ways as a sum of consecutive naturals, for example, 69465 + ... + 579682.

It is an arithmetic number, because the mean of its divisors is an integer number (20789289274).

Almost surely, 2^165603242023 is an apocalyptic number.

165603242023 is a deficient number, since it is larger than the sum of its proper divisors (711072169).

165603242023 is an equidigital number, since it uses as much as digits as its factorization.

165603242023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650241.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 165603242023 its reverse (320242306561), we get a palindrome (485845548584).

The spelling of 165603242023 in words is "one hundred sixty-five billion, six hundred three million, two hundred forty-two thousand, twenty-three".