211889416729 has 4 divisors (see below), whose sum is σ = 224353500084. Its totient is φ = 199425333376.

The previous prime is 211889416723. The next prime is 211889416733. The reversal of 211889416729 is 927614988112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124895094025 + 86994322704 = 353405^2 + 294948^2 .

It is a cyclic number.

It is not a de Polignac number, because 211889416729 - 2³ = 211889416721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211889416721) 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, 6232041652 + ... + 6232041685.

It is an arithmetic number, because the mean of its divisors is an integer number (56088375021).

Almost surely, 2^211889416729 is an apocalyptic number.

It is an amenable number.

211889416729 is a deficient number, since it is larger than the sum of its proper divisors (12464083355).

211889416729 is a wasteful number, since it uses less digits than its factorization.

211889416729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12464083354.

The product of its digits is 3483648, while the sum is 58.

The spelling of 211889416729 in words is "two hundred eleven billion, eight hundred eighty-nine million, four hundred sixteen thousand, seven hundred twenty-nine".