1444144545 has 20 divisors (see below), whose sum is σ = 2588763540. Its totient is φ = 770210208.

The previous prime is 1444144487. The next prime is 1444144549. The reversal of 1444144545 is 5454414441.

It can be written as a sum of positive squares in 2 ways, for example, as 597509136 + 846635409 = 24444^2 + 29097^2 .

It is not a de Polignac number, because 1444144545 - 2¹⁰ = 1444143521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1444144549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1782490 + ... + 1783299.

It is an arithmetic number, because the mean of its divisors is an integer number (129438177).

Almost surely, 2^1444144545 is an apocalyptic number.

1444144545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1444144545 is a deficient number, since it is larger than the sum of its proper divisors (1144618995).

1444144545 is an equidigital number, since it uses as much as digits as its factorization.

1444144545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565806 (or 3565797 counting only the distinct ones).

The product of its digits is 102400, while the sum is 36.

The square root of 1444144545 is about 38001.9018603017. The cubic root of 1444144545 is about 1130.3255764287.

Adding to 1444144545 its reverse (5454414441), we get a palindrome (6898558986).

The spelling of 1444144545 in words is "one billion, four hundred forty-four million, one hundred forty-four thousand, five hundred forty-five".