4443155649 has 27 divisors (see below), whose sum is σ = 6822841987. Its totient is φ = 2785729344.

The previous prime is 4443155543. The next prime is 4443155659. The reversal of 4443155649 is 9465513444.

The square root of 4443155649 is 66657.

It is a perfect power (a square), and thus also a powerful number.

4443155649 is a `hidden beast` number, since 44 + 43 + 1 + 5 + 564 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3459204225 + 983951424 = 58815^2 + 31368^2 .

It is not a de Polignac number, because 4443155649 - 2²³ = 4434767041 is a prime.

It is a super-2 number, since 2×4443155649² = 39483264242481222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4443155659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3398854 + ... + 3400160.

Almost surely, 2^4443155649 is an apocalyptic number.

4443155649 is the 66657-th square number.

4443155649 is the 33329-th centered octagonal number.

It is an amenable number.

4443155649 is a deficient number, since it is larger than the sum of its proper divisors (2379686338).

4443155649 is an equidigital number, since it uses as much as digits as its factorization.

4443155649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 1327 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The cubic root of 4443155649 is about 1643.9824453788.

The spelling of 4443155649 in words is "four billion, four hundred forty-three million, one hundred fifty-five thousand, six hundred forty-nine".