844223561 has 8 divisors (see below), whose sum is σ = 912674880. Its totient is φ = 778174128.

The previous prime is 844223539. The next prime is 844223563. The reversal of 844223561 is 165322448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 844223561 - 2²² = 840029257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (844223563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599741 + ... + 601146.

It is an arithmetic number, because the mean of its divisors is an integer number (114084360).

Almost surely, 2^844223561 is an apocalyptic number.

It is an amenable number.

844223561 is a deficient number, since it is larger than the sum of its proper divisors (68451319).

844223561 is a wasteful number, since it uses less digits than its factorization.

844223561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200943.

The product of its digits is 46080, while the sum is 35.

The square root of 844223561 is about 29055.5254813951. The cubic root of 844223561 is about 945.1175393863.

The spelling of 844223561 in words is "eight hundred forty-four million, two hundred twenty-three thousand, five hundred sixty-one".