165515607206169 has 64 divisors (see below), whose sum is σ = 247698776521728. Its totient is φ = 97462240128000.

The previous prime is 165515607206143. The next prime is 165515607206293. The reversal of 165515607206169 is 961602706515561.

It is a happy number.

It is not a de Polignac number, because 165515607206169 - 2⁷ = 165515607206041 is a prime.

It is a super-2 number, since 2×165515607206169² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165515607208169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109540957 + ... + 111041669.

It is an arithmetic number, because the mean of its divisors is an integer number (3870293383152).

Almost surely, 2^{165515607206169} is an apocalyptic number.

It is an amenable number.

165515607206169 is a deficient number, since it is larger than the sum of its proper divisors (82183169315559).

165515607206169 is a wasteful number, since it uses less digits than its factorization.

165515607206169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501478.

The product of its (nonzero) digits is 20412000, while the sum is 60.

The spelling of 165515607206169 in words is "one hundred sixty-five trillion, five hundred fifteen billion, six hundred seven million, two hundred six thousand, one hundred sixty-nine".