212336640009 has 12 divisors (see below), whose sum is σ = 330301440196. Its totient is φ = 130668701472.

The previous prime is 212336639891. The next prime is 212336640037. The reversal of 212336640009 is 900046633212.

212336640009 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 3 + 6 + 640 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31409763984 + 180926876025 = 177228^2 + 425355^2 .

It is not a de Polignac number, because 212336640009 - 2¹⁹ = 212336115721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212336640049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907421422 + ... + 907421655.

Almost surely, 2^212336640009 is an apocalyptic number.

It is an amenable number.

212336640009 is a deficient number, since it is larger than the sum of its proper divisors (117964800187).

212336640009 is a wasteful number, since it uses less digits than its factorization.

212336640009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814843096 (or 1814843093 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

It can be divided in two parts, 21233664000 and 9, that multiplied together give a cube (191102976000 = 5760³).

The spelling of 212336640009 in words is "two hundred twelve billion, three hundred thirty-six million, six hundred forty thousand, nine".