165506334442 has 16 divisors (see below), whose sum is σ = 250718985000. Its totient is φ = 81934441920.

The previous prime is 165506334439. The next prime is 165506334481. The reversal of 165506334442 is 244433605561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160561291401 + 4945043041 = 400701^2 + 70321^2 .

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, 26184 + ... + 575932.

Almost surely, 2^165506334442 is an apocalyptic number.

165506334442 is a deficient number, since it is larger than the sum of its proper divisors (85212650558).

165506334442 is a wasteful number, since it uses less digits than its factorization.

165506334442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551241.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 165506334442 in words is "one hundred sixty-five billion, five hundred six million, three hundred thirty-four thousand, four hundred forty-two".