812004658212 has 192 divisors, whose sum is σ = 2211117834240. Its totient is φ = 229501977600.

The previous prime is 812004658151. The next prime is 812004658219. The reversal of 812004658212 is 212856400218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (812004658219) 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, 69652288 + ... + 69663944.

It is an arithmetic number, because the mean of its divisors is an integer number (11516238720).

Almost surely, 2^812004658212 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 812004658212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105558917120).

812004658212 is an abundant number, since it is smaller than the sum of its proper divisors (1399113176028).

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

812004658212 is a wasteful number, since it uses less digits than its factorization.

812004658212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12322 (or 12320 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The spelling of 812004658212 in words is "eight hundred twelve billion, four million, six hundred fifty-eight thousand, two hundred twelve".