161545323545423 has 4 divisors (see below), whose sum is σ = 161548734384408. Its totient is φ = 161541912706440.

The previous prime is 161545323545401. The next prime is 161545323545527. The reversal of 161545323545423 is 324545323545161.

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 161545323545423 - 2³⁶ = 161476604068687 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 (161545323445423) 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, 1705348448 + ... + 1705443173.

It is an arithmetic number, because the mean of its divisors is an integer number (40387183596102).

Almost surely, 2^{161545323545423} is an apocalyptic number.

161545323545423 is a deficient number, since it is larger than the sum of its proper divisors (3410838985).

161545323545423 is an equidigital number, since it uses as much as digits as its factorization.

161545323545423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410838984.

The product of its digits is 25920000, while the sum is 53.

The spelling of 161545323545423 in words is "one hundred sixty-one trillion, five hundred forty-five billion, three hundred twenty-three million, five hundred forty-five thousand, four hundred twenty-three".