844447047844 has 9 divisors (see below), whose sum is σ = 1477785550017. Its totient is φ = 422222604984.

The previous prime is 844447047841. The next prime is 844447047889. The reversal of 844447047844 is 448740744448.

It is a happy number.

The square root of 844447047844 is 918938.

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

It can be written as a sum of positive squares in only one way, i.e., 816424287844 + 28022760000 = 903562^2 + 167400^2 .

It is a super-2 number, since 2×844447047844² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (844447047841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1608142 + ... + 2067610.

Almost surely, 2^844447047844 is an apocalyptic number.

844447047844 is the 918938-th square number.

It is an amenable number.

844447047844 is a deficient number, since it is larger than the sum of its proper divisors (633338502173).

844447047844 is an frugal number, since it uses more digits than its factorization.

844447047844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918942 (or 459471 counting only the distinct ones).

The product of its (nonzero) digits is 51380224, while the sum is 58.

The spelling of 844447047844 in words is "eight hundred forty-four billion, four hundred forty-seven million, forty-seven thousand, eight hundred forty-four".