844972161 has 48 divisors (see below), whose sum is σ = 1317529920. Its totient is φ = 479952000.

The previous prime is 844972147. The next prime is 844972171. The reversal of 844972161 is 161279448.

It is not a de Polignac number, because 844972161 - 2⁵ = 844972129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (844972111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 695991 + ... + 697203.

It is an arithmetic number, because the mean of its divisors is an integer number (27448540).

Almost surely, 2^844972161 is an apocalyptic number.

It is an amenable number.

844972161 is a deficient number, since it is larger than the sum of its proper divisors (472557759).

844972161 is a wasteful number, since it uses less digits than its factorization.

844972161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1347 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 844972161 is about 29068.4048581961. The cubic root of 844972161 is about 945.3968121604.

The spelling of 844972161 in words is "eight hundred forty-four million, nine hundred seventy-two thousand, one hundred sixty-one".