44008664621 has 4 divisors (see below), whose sum is σ = 44027181372. Its totient is φ = 43990147872.

The previous prime is 44008664603. The next prime is 44008664663. The reversal of 44008664621 is 12646680044.

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 5075850025 + 38932814596 = 71245^2 + 197314^2 .

It is a cyclic number.

It is not a de Polignac number, because 44008664621 - 2¹⁰ = 44008663597 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 (44008664521) 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, 9254810 + ... + 9259563.

It is an arithmetic number, because the mean of its divisors is an integer number (11006795343).

Almost surely, 2^44008664621 is an apocalyptic number.

It is an amenable number.

44008664621 is a deficient number, since it is larger than the sum of its proper divisors (18516751).

44008664621 is a wasteful number, since it uses less digits than its factorization.

44008664621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18516750.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 44008664621 in words is "forty-four billion, eight million, six hundred sixty-four thousand, six hundred twenty-one".