165244648769 has 4 divisors (see below), whose sum is σ = 174964922244. Its totient is φ = 155524375296.

The previous prime is 165244648741. The next prime is 165244648799. The reversal of 165244648769 is 967846442561.

165244648769 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 can be written as a sum of positive squares in 2 ways, for example, as 114844398769 + 50400250000 = 338887^2 + 224500^2 .

It is a cyclic number.

It is not a de Polignac number, because 165244648769 - 2¹² = 165244644673 is a prime.

It is a super-2 number, since 2×165244648769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165244648729) 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, 4860136712 + ... + 4860136745.

It is an arithmetic number, because the mean of its divisors is an integer number (43741230561).

Almost surely, 2^165244648769 is an apocalyptic number.

It is an amenable number.

165244648769 is a deficient number, since it is larger than the sum of its proper divisors (9720273475).

165244648769 is an equidigital number, since it uses as much as digits as its factorization.

165244648769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720273474.

The product of its digits is 69672960, while the sum is 62.

The spelling of 165244648769 in words is "one hundred sixty-five billion, two hundred forty-four million, six hundred forty-eight thousand, seven hundred sixty-nine".