844474616209 has 45 divisors (see below), whose sum is σ = 1020102079641. Its totient is φ = 697044229560.

The previous prime is 844474616207. The next prime is 844474616213. The reversal of 844474616209 is 902616474448.

The square root of 844474616209 is 918953.

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

It is not a de Polignac number, because 844474616209 - 2¹ = 844474616207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 844474616209.

It is not an unprimeable number, because it can be changed into a prime (844474616207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 11894008644 + ... + 11894008714.

Almost surely, 2^844474616209 is an apocalyptic number.

844474616209 is the 918953-rd square number.

844474616209 is the 459477-th centered octagonal number.

It is an amenable number.

844474616209 is a deficient number, since it is larger than the sum of its proper divisors (175627463432).

844474616209 is an frugal number, since it uses more digits than its factorization.

844474616209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 844474616209 in words is "eight hundred forty-four billion, four hundred seventy-four million, six hundred sixteen thousand, two hundred nine".