844849681 has 16 divisors (see below), whose sum is σ = 937256320. Its totient is φ = 756604800.

The previous prime is 844849673. The next prime is 844849741. The reversal of 844849681 is 186948448.

It is a cyclic number.

It is not a de Polignac number, because 844849681 - 2³ = 844849673 is a prime.

It is a super-2 number, since 2×844849681² = 1427541966971603522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (844849381) 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 15 ways as a sum of consecutive naturals, for example, 79405 + ... + 89413.

It is an arithmetic number, because the mean of its divisors is an integer number (58578520).

Almost surely, 2^844849681 is an apocalyptic number.

It is an amenable number.

844849681 is a deficient number, since it is larger than the sum of its proper divisors (92406639).

844849681 is a wasteful number, since it uses less digits than its factorization.

844849681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216.

The product of its digits is 1769472, while the sum is 52.

The square root of 844849681 is about 29066.2980270966. The cubic root of 844849681 is about 945.3511310512.

The spelling of 844849681 in words is "eight hundred forty-four million, eight hundred forty-nine thousand, six hundred eighty-one".