44539221791 has 4 divisors (see below), whose sum is σ = 47159176032. Its totient is φ = 41919267552.

The previous prime is 44539221767. The next prime is 44539221817. The reversal of 44539221791 is 19712293544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44539221791 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 (44539221761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309977095 + ... + 1309977128.

It is an arithmetic number, because the mean of its divisors is an integer number (11789794008).

Almost surely, 2^44539221791 is an apocalyptic number.

44539221791 is a deficient number, since it is larger than the sum of its proper divisors (2619954241).

44539221791 is a wasteful number, since it uses less digits than its factorization.

44539221791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619954240.

The product of its digits is 544320, while the sum is 47.

The spelling of 44539221791 in words is "forty-four billion, five hundred thirty-nine million, two hundred twenty-one thousand, seven hundred ninety-one".