165704388442 has 16 divisors (see below), whose sum is σ = 253910194560. Its totient is φ = 81068562208.

The previous prime is 165704388403. The next prime is 165704388461. The reversal of 165704388442 is 244883407561.

165704388442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165704388442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144993 + ... + 593659.

It is an arithmetic number, because the mean of its divisors is an integer number (15869387160).

Almost surely, 2^165704388442 is an apocalyptic number.

165704388442 is a deficient number, since it is larger than the sum of its proper divisors (88205806118).

165704388442 is a wasteful number, since it uses less digits than its factorization.

165704388442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452645.

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 165704388442 in words is "one hundred sixty-five billion, seven hundred four million, three hundred eighty-eight thousand, four hundred forty-two".