44398138689 has 40 divisors (see below), whose sum is σ = 70348737888. Its totient is φ = 27808375680.

The previous prime is 44398138663. The next prime is 44398138693. The reversal of 44398138689 is 98683189344.

44398138689 is a `hidden beast` number, since 4 + 439 + 8 + 138 + 68 + 9 = 666.

It is not a de Polignac number, because 44398138689 - 2⁹ = 44398138177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44398138289) 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 39 ways as a sum of consecutive naturals, for example, 758034 + ... + 814500.

Almost surely, 2^44398138689 is an apocalyptic number.

It is an amenable number.

44398138689 is a deficient number, since it is larger than the sum of its proper divisors (25950599199).

44398138689 is a wasteful number, since it uses less digits than its factorization.

44398138689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57067 (or 57058 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 63.

The spelling of 44398138689 in words is "forty-four billion, three hundred ninety-eight million, one hundred thirty-eight thousand, six hundred eighty-nine".