1444959865 has 16 divisors (see below), whose sum is σ = 1756774656. Its totient is φ = 1140784000.

The previous prime is 1444959809. The next prime is 1444959871. The reversal of 1444959865 is 5689594441.

It is not a de Polignac number, because 1444959865 - 2¹¹ = 1444957817 is a prime.

It is a super-2 number, since 2×1444959865² = 4175818022921636450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613440 + ... + 615790.

It is an arithmetic number, because the mean of its divisors is an integer number (109798416).

Almost surely, 2^1444959865 is an apocalyptic number.

It is an amenable number.

1444959865 is a deficient number, since it is larger than the sum of its proper divisors (311814791).

1444959865 is a wasteful number, since it uses less digits than its factorization.

1444959865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920.

The product of its digits is 6220800, while the sum is 55.

The square root of 1444959865 is about 38012.6277044879. The cubic root of 1444959865 is about 1130.5382522016.

The spelling of 1444959865 in words is "one billion, four hundred forty-four million, nine hundred fifty-nine thousand, eight hundred sixty-five".