165542559242 has 8 divisors (see below), whose sum is σ = 252999005796. Its totient is φ = 81209557312.

The previous prime is 165542559233. The next prime is 165542559253. The reversal of 165542559242 is 242955245561.

It is a happy number.

165542559242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 162956735041 + 2585824201 = 403679^2 + 50851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×165542559242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780861023 + ... + 780861234.

Almost surely, 2^165542559242 is an apocalyptic number.

165542559242 is a deficient number, since it is larger than the sum of its proper divisors (87456446554).

165542559242 is a wasteful number, since it uses less digits than its factorization.

165542559242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561722312.

The product of its digits is 4320000, while the sum is 50.

The spelling of 165542559242 in words is "one hundred sixty-five billion, five hundred forty-two million, five hundred fifty-nine thousand, two hundred forty-two".