165365019967 has 4 divisors (see below), whose sum is σ = 188988594256. Its totient is φ = 141741445680.

The previous prime is 165365019961. The next prime is 165365020013. The reversal of 165365019967 is 769910563561.

165365019967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165365019967 - 2³ = 165365019959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165365019961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11811787134 + ... + 11811787147.

It is an arithmetic number, because the mean of its divisors is an integer number (47247148564).

Almost surely, 2^165365019967 is an apocalyptic number.

165365019967 is a deficient number, since it is larger than the sum of its proper divisors (23623574289).

165365019967 is an equidigital number, since it uses as much as digits as its factorization.

165365019967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23623574288.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 165365019967 in words is "one hundred sixty-five billion, three hundred sixty-five million, nineteen thousand, nine hundred sixty-seven".