1444965569 has 2 divisors, whose sum is σ = 1444965570. Its totient is φ = 1444965568.

The previous prime is 1444965563. The next prime is 1444965581. The reversal of 1444965569 is 9655694441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392185344 + 52780225 = 37312^2 + 7265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444965569 is a prime.

It is a super-2 number, since 2×1444965569² = 4175850991190987522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1444965569.

It is not a weakly prime, because it can be changed into another prime (1444965563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722482784 + 722482785.

It is an arithmetic number, because the mean of its divisors is an integer number (722482785).

Almost surely, 2^1444965569 is an apocalyptic number.

It is an amenable number.

1444965569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444965569 is an equidigital number, since it uses as much as digits as its factorization.

1444965569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The square root of 1444965569 is about 38012.7027321131. The cubic root of 1444965569 is about 1130.5397398050.

The spelling of 1444965569 in words is "one billion, four hundred forty-four million, nine hundred sixty-five thousand, five hundred sixty-nine".