165121601171016 has 32 divisors (see below), whose sum is σ = 471776003346240. Its totient is φ = 47177600334528.

The previous prime is 165121601170987. The next prime is 165121601171029. The reversal of 165121601171016 is 610171106121561.

It is a happy number.

165121601171016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 491433336651 + ... + 491433336986.

It is an arithmetic number, because the mean of its divisors is an integer number (14743000104570).

Almost surely, 2^{165121601171016} is an apocalyptic number.

It is an amenable number.

165121601171016 is an abundant number, since it is smaller than the sum of its proper divisors (306654402175224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165121601171016 is a wasteful number, since it uses less digits than its factorization.

165121601171016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982866673653 (or 982866673649 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 39.

Adding to 165121601171016 its reverse (610171106121561), we get a palindrome (775292707292577).

The spelling of 165121601171016 in words is "one hundred sixty-five trillion, one hundred twenty-one billion, six hundred one million, one hundred seventy-one thousand, sixteen".