165045636660433 has 4 divisors (see below), whose sum is σ = 165045835616320. Its totient is φ = 165045437704548.

The previous prime is 165045636660329. The next prime is 165045636660491. The reversal of 165045636660433 is 334066636540561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165045636660433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165045636660133) 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, 98228373 + ... + 99894466.

It is an arithmetic number, because the mean of its divisors is an integer number (41261458904080).

Almost surely, 2^{165045636660433} is an apocalyptic number.

It is an amenable number.

165045636660433 is a deficient number, since it is larger than the sum of its proper divisors (198955887).

165045636660433 is an equidigital number, since it uses as much as digits as its factorization.

165045636660433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198955886.

The product of its (nonzero) digits is 83980800, while the sum is 58.

The spelling of 165045636660433 in words is "one hundred sixty-five trillion, forty-five billion, six hundred thirty-six million, six hundred sixty thousand, four hundred thirty-three".