844138928973 has 8 divisors (see below), whose sum is σ = 1125523188000. Its totient is φ = 562756977968.

The previous prime is 844138928951. The next prime is 844138929001. The reversal of 844138928973 is 379829831448.

844138928973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 844138928973 - 2²¹ = 844136831821 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844138926973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647818 + ... + 1451876.

It is an arithmetic number, because the mean of its divisors is an integer number (140690398500).

Almost surely, 2^844138928973 is an apocalyptic number.

It is an amenable number.

844138928973 is a deficient number, since it is larger than the sum of its proper divisors (281384259027).

844138928973 is a wasteful number, since it uses less digits than its factorization.

844138928973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154011.

The product of its digits is 83607552, while the sum is 66.

The spelling of 844138928973 in words is "eight hundred forty-four billion, one hundred thirty-eight million, nine hundred twenty-eight thousand, nine hundred seventy-three".