144243965989 has 4 divisors (see below), whose sum is σ = 144331018924. Its totient is φ = 144156913056.

The previous prime is 144243965959. The next prime is 144243966011. The reversal of 144243965989 is 989569342441.

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 17119628964 + 127124337025 = 130842^2 + 356545^2 .

It is a cyclic number.

It is not a de Polignac number, because 144243965989 - 2¹³ = 144243957797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144243965989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144243965959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43523982 + ... + 43527295.

It is an arithmetic number, because the mean of its divisors is an integer number (36082754731).

Almost surely, 2^144243965989 is an apocalyptic number.

It is an amenable number.

144243965989 is a deficient number, since it is larger than the sum of its proper divisors (87052935).

144243965989 is an equidigital number, since it uses as much as digits as its factorization.

144243965989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87052934.

The product of its digits is 67184640, while the sum is 64.

The spelling of 144243965989 in words is "one hundred forty-four billion, two hundred forty-three million, nine hundred sixty-five thousand, nine hundred eighty-nine".