844866464861 has 16 divisors (see below), whose sum is σ = 876094832640. Its totient is φ = 813887879040.

The previous prime is 844866464851. The next prime is 844866464881. The reversal of 844866464861 is 168464668448.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-844866464861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844866464851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59461220 + ... + 59475426.

It is an arithmetic number, because the mean of its divisors is an integer number (54755927040).

Almost surely, 2^844866464861 is an apocalyptic number.

It is an amenable number.

844866464861 is a deficient number, since it is larger than the sum of its proper divisors (31228367779).

844866464861 is a wasteful number, since it uses less digits than its factorization.

844866464861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22844.

The product of its digits is 169869312, while the sum is 65.

The spelling of 844866464861 in words is "eight hundred forty-four billion, eight hundred sixty-six million, four hundred sixty-four thousand, eight hundred sixty-one".