165444953311 has 8 divisors (see below), whose sum is σ = 180625438800. Its totient is φ = 150287807040.

The previous prime is 165444953257. The next prime is 165444953321. The reversal of 165444953311 is 113359444561.

It is a happy number.

165444953311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165444953311 - 2⁷ = 165444953183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165444953321) 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 7 ways as a sum of consecutive naturals, for example, 5819976 + ... + 5848333.

It is an arithmetic number, because the mean of its divisors is an integer number (22578179850).

Almost surely, 2^165444953311 is an apocalyptic number.

165444953311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165444953311 is a deficient number, since it is larger than the sum of its proper divisors (15180485489).

165444953311 is a wasteful number, since it uses less digits than its factorization.

165444953311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11669609.

The product of its digits is 777600, while the sum is 46.

The spelling of 165444953311 in words is "one hundred sixty-five billion, four hundred forty-four million, nine hundred fifty-three thousand, three hundred eleven".