1444535161 has 4 divisors (see below), whose sum is σ = 1457318772. Its totient is φ = 1431751552.

The previous prime is 1444535159. The next prime is 1444535221. The reversal of 1444535161 is 1615354441.

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 164326761 + 1280208400 = 12819^2 + 35780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444535161 - 2¹ = 1444535159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444535761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6391636 + ... + 6391861.

It is an arithmetic number, because the mean of its divisors is an integer number (364329693).

Almost surely, 2^1444535161 is an apocalyptic number.

It is an amenable number.

1444535161 is a deficient number, since it is larger than the sum of its proper divisors (12783611).

1444535161 is a wasteful number, since it uses less digits than its factorization.

1444535161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12783610.

The product of its digits is 28800, while the sum is 34.

The square root of 1444535161 is about 38007.0409398048. The cubic root of 1444535161 is about 1130.4274783828.

The spelling of 1444535161 in words is "one billion, four hundred forty-four million, five hundred thirty-five thousand, one hundred sixty-one".