165351243260163 has 4 divisors (see below), whose sum is σ = 220468324346888. Its totient is φ = 110234162173440.

The previous prime is 165351243260141. The next prime is 165351243260209. The reversal of 165351243260163 is 361062342153561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165351243260163 - 2⁵ = 165351243260131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165351243261163) 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, 27558540543358 + ... + 27558540543363.

It is an arithmetic number, because the mean of its divisors is an integer number (55117081086722).

Almost surely, 2^{165351243260163} is an apocalyptic number.

165351243260163 is a deficient number, since it is larger than the sum of its proper divisors (55117081086725).

165351243260163 is an equidigital number, since it uses as much as digits as its factorization.

165351243260163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55117081086724.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 165351243260163 in words is "one hundred sixty-five trillion, three hundred fifty-one billion, two hundred forty-three million, two hundred sixty thousand, one hundred sixty-three".