844812520320 has 128 divisors (see below), whose sum is σ = 2698684037280. Its totient is φ = 224794419200.

The previous prime is 844812520313. The next prime is 844812520399. The reversal of 844812520320 is 23025218448.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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, 407890 + ... + 1362350.

Almost surely, 2^844812520320 is an apocalyptic number.

844812520320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844812520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349342018640).

844812520320 is an abundant number, since it is smaller than the sum of its proper divisors (1853871516960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

844812520320 is a wasteful number, since it uses less digits than its factorization.

844812520320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954944 (or 954932 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

Adding to 844812520320 its reverse (23025218448), we get a palindrome (867837738768).

The spelling of 844812520320 in words is "eight hundred forty-four billion, eight hundred twelve million, five hundred twenty thousand, three hundred twenty".