1144440161 has 4 divisors (see below), whose sum is σ = 1144525872. Its totient is φ = 1144354452.

The previous prime is 1144440151. The next prime is 1144440163. The reversal of 1144440161 is 1610444411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1144440161 - 2¹⁸ = 1144178017 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 1144440161.

It is not an unprimeable number, because it can be changed into a prime (1144440163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18035 + ... + 51128.

It is an arithmetic number, because the mean of its divisors is an integer number (286131468).

Almost surely, 2^1144440161 is an apocalyptic number.

It is an amenable number.

1144440161 is a deficient number, since it is larger than the sum of its proper divisors (85711).

1144440161 is an equidigital number, since it uses as much as digits as its factorization.

1144440161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85710.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1144440161 is about 33829.5752411998. The cubic root of 1144440161 is about 1045.9984233823.

Adding to 1144440161 its reverse (1610444411), we get a palindrome (2754884572).

The spelling of 1144440161 in words is "one billion, one hundred forty-four million, four hundred forty thousand, one hundred sixty-one".