211968736909 has 8 divisors (see below), whose sum is σ = 223218744480. Its totient is φ = 200728105200.

The previous prime is 211968736867. The next prime is 211968737011. The reversal of 211968736909 is 909637869112.

211968736909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211968736909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211968736409) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2297527 + ... + 2388004.

It is an arithmetic number, because the mean of its divisors is an integer number (27902343060).

Almost surely, 2^211968736909 is an apocalyptic number.

It is an amenable number.

211968736909 is a deficient number, since it is larger than the sum of its proper divisors (11250007571).

211968736909 is a wasteful number, since it uses less digits than its factorization.

211968736909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687931.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The spelling of 211968736909 in words is "two hundred eleven billion, nine hundred sixty-eight million, seven hundred thirty-six thousand, nine hundred nine".