165409696000 has 72 divisors (see below), whose sum is σ = 412056308664. Its totient is φ = 66163865600.

The previous prime is 165409695991. The next prime is 165409696027. The reversal of 165409696000 is 696904561.

It can be written as a sum of positive squares in 4 ways, for example, as 807469056 + 164602226944 = 28416^2 + 405712^2 .

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, 2552527 + ... + 2616526.

It is an arithmetic number, because the mean of its divisors is an integer number (5723004287).

Almost surely, 2^165409696000 is an apocalyptic number.

165409696000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165409696000 is an abundant number, since it is smaller than the sum of its proper divisors (246646612664).

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

165409696000 is an frugal number, since it uses more digits than its factorization.

165409696000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169084 (or 5169060 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 165409696000 in words is "one hundred sixty-five billion, four hundred nine million, six hundred ninety-six thousand".