165263135222543 has 4 divisors (see below), whose sum is σ = 165263246222880. Its totient is φ = 165263024222208.

The previous prime is 165263135222527. The next prime is 165263135222551. The reversal of 165263135222543 is 345222531362561.

It is a happy number.

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 165263135222543 - 2⁴ = 165263135222527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165263135222491 and 165263135222500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165263135227543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53236103 + ... + 56254856.

It is an arithmetic number, because the mean of its divisors is an integer number (41315811555720).

Almost surely, 2^{165263135222543} is an apocalyptic number.

165263135222543 is a deficient number, since it is larger than the sum of its proper divisors (111000337).

165263135222543 is a wasteful number, since it uses less digits than its factorization.

165263135222543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111000336.

The product of its digits is 7776000, while the sum is 50.

The spelling of 165263135222543 in words is "one hundred sixty-five trillion, two hundred sixty-three billion, one hundred thirty-five million, two hundred twenty-two thousand, five hundred forty-three".