165256244005242 has 16 divisors (see below), whose sum is σ = 355936525549920. Its totient is φ = 50848075078512.

The previous prime is 165256244005241. The next prime is 165256244005253. The reversal of 165256244005242 is 242500442652561.

It is a junction number, because it is equal to n+sod(n) for n = 165256244005191 and 165256244005200.

It is not an unprimeable number, because it can be changed into a prime (165256244005241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059334897392 + ... + 1059334897547.

It is an arithmetic number, because the mean of its divisors is an integer number (22246032846870).

Almost surely, 2^{165256244005242} is an apocalyptic number.

165256244005242 is an abundant number, since it is smaller than the sum of its proper divisors (190680281544678).

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

165256244005242 is a wasteful number, since it uses less digits than its factorization.

165256244005242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118669794957.

The product of its (nonzero) digits is 4608000, while the sum is 48.

The spelling of 165256244005242 in words is "one hundred sixty-five trillion, two hundred fifty-six billion, two hundred forty-four million, five thousand, two hundred forty-two".