165109712369 has 16 divisors (see below), whose sum is σ = 191731276800. Its totient is φ = 139260354000.

The previous prime is 165109712311. The next prime is 165109712441. The reversal of 165109712369 is 963217901561.

165109712369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165109712369 - 2²⁰ = 165108663793 is a prime.

It is a super-2 number, since 2×165109712369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165109712269) 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 15 ways as a sum of consecutive naturals, for example, 420269 + ... + 711930.

It is an arithmetic number, because the mean of its divisors is an integer number (11983204800).

Almost surely, 2^165109712369 is an apocalyptic number.

It is an amenable number.

165109712369 is a deficient number, since it is larger than the sum of its proper divisors (26621564431).

165109712369 is a wasteful number, since it uses less digits than its factorization.

165109712369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132540.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 165109712369 in words is "one hundred sixty-five billion, one hundred nine million, seven hundred twelve thousand, three hundred sixty-nine".