165224869165 has 8 divisors (see below), whose sum is σ = 199297149048. Its totient is φ = 131495024640.

The previous prime is 165224869127. The next prime is 165224869177. The reversal of 165224869165 is 561968422561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49296876841 + 115927992324 = 222029^2 + 340482^2 .

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

It is not a de Polignac number, because 165224869165 - 2¹⁹ = 165224344877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85607776 + ... + 85609705.

It is an arithmetic number, because the mean of its divisors is an integer number (24912143631).

Almost surely, 2^165224869165 is an apocalyptic number.

It is an amenable number.

165224869165 is a deficient number, since it is larger than the sum of its proper divisors (34072279883).

165224869165 is a wasteful number, since it uses less digits than its factorization.

165224869165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171217679.

The product of its digits is 6220800, while the sum is 55.

The spelling of 165224869165 in words is "one hundred sixty-five billion, two hundred twenty-four million, eight hundred sixty-nine thousand, one hundred sixty-five".