165743528243 has 4 divisors (see below), whose sum is σ = 168013987608. Its totient is φ = 163473068880.

The previous prime is 165743528221. The next prime is 165743528309. The reversal of 165743528243 is 342825347561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342825347561 = 29 ⋅11821563709.

It is a cyclic number.

It is not a de Polignac number, because 165743528243 - 2⁶ = 165743528179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165743528191 and 165743528200.

It is not an unprimeable number, because it can be changed into a prime (165743528843) 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, 1135229573 + ... + 1135229718.

It is an arithmetic number, because the mean of its divisors is an integer number (42003496902).

Almost surely, 2^165743528243 is an apocalyptic number.

165743528243 is a deficient number, since it is larger than the sum of its proper divisors (2270459365).

165743528243 is an equidigital number, since it uses as much as digits as its factorization.

165743528243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270459364.

The product of its digits is 4838400, while the sum is 50.

The spelling of 165743528243 in words is "one hundred sixty-five billion, seven hundred forty-three million, five hundred twenty-eight thousand, two hundred forty-three".