165353313563 has 4 divisors (see below), whose sum is σ = 174056119560. Its totient is φ = 156650507568.

The previous prime is 165353313509. The next prime is 165353313733. The reversal of 165353313563 is 365313353561.

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 165353313563 - 2¹² = 165353309467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165353315563) 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, 4351402970 + ... + 4351403007.

It is an arithmetic number, because the mean of its divisors is an integer number (43514029890).

Almost surely, 2^165353313563 is an apocalyptic number.

165353313563 is a deficient number, since it is larger than the sum of its proper divisors (8702805997).

165353313563 is an equidigital number, since it uses as much as digits as its factorization.

165353313563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8702805996.

The product of its digits is 1093500, while the sum is 44.

The spelling of 165353313563 in words is "one hundred sixty-five billion, three hundred fifty-three million, three hundred thirteen thousand, five hundred sixty-three".