816788434212 has 36 divisors (see below), whose sum is σ = 2064800215296. Its totient is φ = 272244275760.

The previous prime is 816788434201. The next prime is 816788434243. The reversal of 816788434212 is 212434887618.

816788434212 is a `hidden beast` number, since 81 + 67 + 8 + 84 + 3 + 421 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230988 + ... + 1298819.

It is an arithmetic number, because the mean of its divisors is an integer number (57355561536).

Almost surely, 2^816788434212 is an apocalyptic number.

It is an amenable number.

816788434212 is an abundant number, since it is smaller than the sum of its proper divisors (1248011781084).

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

816788434212 is a wasteful number, since it uses less digits than its factorization.

816788434212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544648 (or 1544643 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 54.

The spelling of 816788434212 in words is "eight hundred sixteen billion, seven hundred eighty-eight million, four hundred thirty-four thousand, two hundred twelve".