1444345165 has 4 divisors (see below), whose sum is σ = 1733214204. Its totient is φ = 1155476128.

The previous prime is 1444345163. The next prime is 1444345169. The reversal of 1444345165 is 5615434441.

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 477072964 + 967272201 = 21842^2 + 31101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444345165 - 2¹ = 1444345163 is a prime.

It is a super-5 number, since 5×1444345165⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444345163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144434512 + ... + 144434521.

It is an arithmetic number, because the mean of its divisors is an integer number (433303551).

Almost surely, 2^1444345165 is an apocalyptic number.

It is an amenable number.

1444345165 is a deficient number, since it is larger than the sum of its proper divisors (288869039).

1444345165 is an equidigital number, since it uses as much as digits as its factorization.

1444345165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288869038.

The product of its digits is 115200, while the sum is 37.

The square root of 1444345165 is about 38004.5413733675. The cubic root of 1444345165 is about 1130.3779154687.

The spelling of 1444345165 in words is "one billion, four hundred forty-four million, three hundred forty-five thousand, one hundred sixty-five".