165205406224012 has 48 divisors (see below), whose sum is σ = 360729980190720. Its totient is φ = 64315417478400.

The previous prime is 165205406223947. The next prime is 165205406224063. The reversal of 165205406224012 is 210422604502561.

It is a super-2 number, since 2×165205406224012² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209293789 + ... + 210081652.

It is an arithmetic number, because the mean of its divisors is an integer number (7515207920640).

Almost surely, 2^{165205406224012} is an apocalyptic number.

It is an amenable number.

165205406224012 is an abundant number, since it is smaller than the sum of its proper divisors (195524573966708).

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

165205406224012 is a wasteful number, since it uses less digits than its factorization.

165205406224012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419376742 (or 419376740 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 165205406224012 in words is "one hundred sixty-five trillion, two hundred five billion, four hundred six million, two hundred twenty-four thousand, twelve".