165244353135643 has 4 divisors (see below), whose sum is σ = 165675800533248. Its totient is φ = 164812905738040.

The previous prime is 165244353135611. The next prime is 165244353135649. The reversal of 165244353135643 is 346531353442561.

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 165244353135643 - 2⁵ = 165244353135611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165244353135649) 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, 215723698228 + ... + 215723698993.

It is an arithmetic number, because the mean of its divisors is an integer number (41418950133312).

Almost surely, 2^{165244353135643} is an apocalyptic number.

165244353135643 is a deficient number, since it is larger than the sum of its proper divisors (431447397605).

165244353135643 is an equidigital number, since it uses as much as digits as its factorization.

165244353135643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431447397604.

The product of its digits is 46656000, while the sum is 55.

The spelling of 165244353135643 in words is "one hundred sixty-five trillion, two hundred forty-four billion, three hundred fifty-three million, one hundred thirty-five thousand, six hundred forty-three".