44540836209 has 27 divisors (see below), whose sum is σ = 65062716537. Its totient is φ = 29362547016.

The previous prime is 44540836201. The next prime is 44540836237. The reversal of 44540836209 is 90263804544.

The square root of 44540836209 is 211047.

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

44540836209 is a `hidden beast` number, since 4 + 4 + 5 + 408 + 36 + 209 = 666.

It is not a de Polignac number, because 44540836209 - 2³ = 44540836201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44540836201) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 65213182 + ... + 65213864.

Almost surely, 2^44540836209 is an apocalyptic number.

44540836209 is the 211047-th square number.

44540836209 is the 105524-th centered octagonal number.

It is an amenable number.

44540836209 is a deficient number, since it is larger than the sum of its proper divisors (20521880328).

44540836209 is an frugal number, since it uses more digits than its factorization.

44540836209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 44540836209 in words is "forty-four billion, five hundred forty million, eight hundred thirty-six thousand, two hundred nine".