212085694784 has 28 divisors (see below), whose sum is σ = 431122374228. Its totient is φ = 103456435200.

The previous prime is 212085694783. The next prime is 212085694801. The reversal of 212085694784 is 487496580212.

It can be written as a sum of positive squares in 2 ways, for example, as 64045437184 + 148040257600 = 253072^2 + 384760^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212085694783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40410047 + ... + 40415294.

It is an arithmetic number, because the mean of its divisors is an integer number (15397227651).

Almost surely, 2^212085694784 is an apocalyptic number.

It is an amenable number.

212085694784 is an abundant number, since it is smaller than the sum of its proper divisors (219036679444).

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

212085694784 is an equidigital number, since it uses as much as digits as its factorization.

212085694784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80825394 (or 80825384 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 212085694784 in words is "two hundred twelve billion, eighty-five million, six hundred ninety-four thousand, seven hundred eighty-four".