165423303321603 has 8 divisors (see below), whose sum is σ = 221511032774928. Its totient is φ = 109808888041344.

The previous prime is 165423303321571. The next prime is 165423303321611. The reversal of 165423303321603 is 306123303324561.

165423303321603 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 165423303321603 - 2⁵ = 165423303321571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165423303321623) 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, 118328542450 + ... + 118328543847.

It is an arithmetic number, because the mean of its divisors is an integer number (27688879096866).

Almost surely, 2^{165423303321603} is an apocalyptic number.

165423303321603 is a deficient number, since it is larger than the sum of its proper divisors (56087729453325).

165423303321603 is a wasteful number, since it uses less digits than its factorization.

165423303321603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236657086533.

The product of its (nonzero) digits is 699840, while the sum is 42.

The spelling of 165423303321603 in words is "one hundred sixty-five trillion, four hundred twenty-three billion, three hundred three million, three hundred twenty-one thousand, six hundred three".