844299373221 has 12 divisors (see below), whose sum is σ = 1291281394572. Its totient is φ = 529756469376.

The previous prime is 844299373219. The next prime is 844299373237. The reversal of 844299373221 is 122373992448.

It is a happy number.

844299373221 is a `hidden beast` number, since 8 + 4 + 42 + 9 + 9 + 373 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 399891816900 + 444407556321 = 632370^2 + 666639^2 .

It is not a de Polignac number, because 844299373221 - 2¹ = 844299373219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844299373721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2759148126 + ... + 2759148431.

It is an arithmetic number, because the mean of its divisors is an integer number (107606782881).

Almost surely, 2^844299373221 is an apocalyptic number.

It is an amenable number.

844299373221 is a deficient number, since it is larger than the sum of its proper divisors (446982021351).

844299373221 is a wasteful number, since it uses less digits than its factorization.

844299373221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518296580 (or 5518296577 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 844299373221 in words is "eight hundred forty-four billion, two hundred ninety-nine million, three hundred seventy-three thousand, two hundred twenty-one".