44331164621 has 4 divisors (see below), whose sum is σ = 45859825500. Its totient is φ = 42802503744.

The previous prime is 44331164617. The next prime is 44331164651. The reversal of 44331164621 is 12646113344.

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 21959979721 + 22371184900 = 148189^2 + 149570^2 .

It is a cyclic number.

It is not a de Polignac number, because 44331164621 - 2² = 44331164617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44331164651) 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, 764330396 + ... + 764330453.

It is an arithmetic number, because the mean of its divisors is an integer number (11464956375).

Almost surely, 2^44331164621 is an apocalyptic number.

It is an amenable number.

44331164621 is a deficient number, since it is larger than the sum of its proper divisors (1528660879).

44331164621 is a wasteful number, since it uses less digits than its factorization.

44331164621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528660878.

The product of its digits is 41472, while the sum is 35.

Adding to 44331164621 its reverse (12646113344), we get a palindrome (56977277965).

The spelling of 44331164621 in words is "forty-four billion, three hundred thirty-one million, one hundred sixty-four thousand, six hundred twenty-one".