812798243712 has 512 divisors, whose sum is σ = 2969737344000. Its totient is φ = 213111005184.

The previous prime is 812798243641. The next prime is 812798243713. The reversal of 812798243712 is 217342897218.

812798243712 is a `hidden beast` number, since 8 + 127 + 9 + 82 + 437 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812798243713) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54400339 + ... + 54415277.

It is an arithmetic number, because the mean of its divisors is an integer number (5800268250).

Almost surely, 2^812798243712 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 812798243712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484868672000).

812798243712 is an abundant number, since it is smaller than the sum of its proper divisors (2156939100288).

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

812798243712 is a wasteful number, since it uses less digits than its factorization.

812798243712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15155 (or 15137 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 812798243712 in words is "eight hundred twelve billion, seven hundred ninety-eight million, two hundred forty-three thousand, seven hundred twelve".