142220045665 has 4 divisors (see below), whose sum is σ = 170664054804. Its totient is φ = 113776036528.

The previous prime is 142220045581. The next prime is 142220045677. The reversal of 142220045665 is 566540022241.

It is a happy number.

142220045665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113493524544 + 28726521121 = 336888^2 + 169489^2 .

It is a cyclic number.

It is not a de Polignac number, because 142220045665 - 2²⁷ = 142085827937 is a prime.

It is a Duffinian number.

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, 14222004562 + ... + 14222004571.

It is an arithmetic number, because the mean of its divisors is an integer number (42666013701).

Almost surely, 2^142220045665 is an apocalyptic number.

It is an amenable number.

142220045665 is a deficient number, since it is larger than the sum of its proper divisors (28444009139).

142220045665 is an equidigital number, since it uses as much as digits as its factorization.

142220045665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28444009138.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 142220045665 in words is "one hundred forty-two billion, two hundred twenty million, forty-five thousand, six hundred sixty-five".