812680778224 has 80 divisors (see below), whose sum is σ = 1826211972096. Its totient is φ = 343130457600.

The previous prime is 812680778207. The next prime is 812680778227. The reversal of 812680778224 is 422877086218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812680778227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10833004 + ... + 10907764.

Almost surely, 2^812680778224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812680778224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913105986048).

812680778224 is an abundant number, since it is smaller than the sum of its proper divisors (1013531193872).

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

812680778224 is a wasteful number, since it uses less digits than its factorization.

812680778224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76214 (or 76208 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 55.

The spelling of 812680778224 in words is "eight hundred twelve billion, six hundred eighty million, seven hundred seventy-eight thousand, two hundred twenty-four".