212689947852 has 48 divisors (see below), whose sum is σ = 561822518880. Its totient is φ = 69558974784.

The previous prime is 212689947803. The next prime is 212689947863. The reversal of 212689947852 is 258749986212.

212689947852 is a `hidden beast` number, since 2 + 1 + 26 + 8 + 99 + 478 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 212689947852.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18573063 + ... + 18584510.

It is an arithmetic number, because the mean of its divisors is an integer number (11704635810).

Almost surely, 2^212689947852 is an apocalyptic number.

It is an amenable number.

212689947852 is an abundant number, since it is smaller than the sum of its proper divisors (349132571028).

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

212689947852 is a wasteful number, since it uses less digits than its factorization.

212689947852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37157639 (or 37157631 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 212689947852 in words is "two hundred twelve billion, six hundred eighty-nine million, nine hundred forty-seven thousand, eight hundred fifty-two".