4445989549 has 4 divisors (see below), whose sum is σ = 4707518364. Its totient is φ = 4184460736.

The previous prime is 4445989547. The next prime is 4445989553. The reversal of 4445989549 is 9459895444.

4445989549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4162572324 + 283417225 = 64518^2 + 16835^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445989549 - 2¹ = 4445989547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445989543) 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, 130764382 + ... + 130764415.

It is an arithmetic number, because the mean of its divisors is an integer number (1176879591).

Almost surely, 2^4445989549 is an apocalyptic number.

It is an amenable number.

4445989549 is a deficient number, since it is larger than the sum of its proper divisors (261528815).

4445989549 is a wasteful number, since it uses less digits than its factorization.

4445989549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261528814.

The product of its digits is 37324800, while the sum is 61.

The square root of 4445989549 is about 66678.2539438459. The cubic root of 4445989549 is about 1644.3318885879.

The spelling of 4445989549 in words is "four billion, four hundred forty-five million, nine hundred eighty-nine thousand, five hundred forty-nine".