165816926469 has 56 divisors (see below), whose sum is σ = 250089198840. Its totient is φ = 109889716608.

The previous prime is 165816926459. The next prime is 165816926507. The reversal of 165816926469 is 964629618561.

165816926469 is a `hidden beast` number, since 1 + 6 + 5 + 8 + 169 + 2 + 6 + 469 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1573153569 + 164243772900 = 39663^2 + 405270^2 .

It is not a de Polignac number, because 165816926469 - 2¹¹ = 165816924421 is a prime.

It is a super-2 number, since 2×165816926469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165816926449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 148447899 + ... + 148449015.

Almost surely, 2^165816926469 is an apocalyptic number.

It is an amenable number.

165816926469 is a deficient number, since it is larger than the sum of its proper divisors (84272272371).

165816926469 is an equidigital number, since it uses as much as digits as its factorization.

165816926469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2146 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 63.

The spelling of 165816926469 in words is "one hundred sixty-five billion, eight hundred sixteen million, nine hundred twenty-six thousand, four hundred sixty-nine".