44391961636 has 81 divisors (see below), whose sum is σ = 87369584211. Its totient is φ = 19720958400.

The previous prime is 44391961583. The next prime is 44391961711. The reversal of 44391961636 is 63616919344.

The square root of 44391961636 is 210694.

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

44391961636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23614468900 + 20777492736 = 153670^2 + 144144^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 282751270 + ... + 282751426.

Almost surely, 2^44391961636 is an apocalyptic number.

44391961636 is the 210694-th square number.

It is an amenable number.

44391961636 is a deficient number, since it is larger than the sum of its proper divisors (42977622575).

44391961636 is a wasteful number, since it uses less digits than its factorization.

44391961636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 231 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 52.

The spelling of 44391961636 in words is "forty-four billion, three hundred ninety-one million, nine hundred sixty-one thousand, six hundred thirty-six".