165063740123 has 4 divisors (see below), whose sum is σ = 168178150368. Its totient is φ = 161949329880.

The previous prime is 165063740113. The next prime is 165063740129. The reversal of 165063740123 is 321047360561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165063740123 - 2¹⁸ = 165063477979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165063740129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1557205043 + ... + 1557205148.

It is an arithmetic number, because the mean of its divisors is an integer number (42044537592).

Almost surely, 2^165063740123 is an apocalyptic number.

165063740123 is a deficient number, since it is larger than the sum of its proper divisors (3114410245).

165063740123 is an equidigital number, since it uses as much as digits as its factorization.

165063740123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114410244.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 165063740123 in words is "one hundred sixty-five billion, sixty-three million, seven hundred forty thousand, one hundred twenty-three".