211536368194 has 4 divisors (see below), whose sum is σ = 317304552294. Its totient is φ = 105768184096.

The previous prime is 211536368149. The next prime is 211536368201. The reversal of 211536368194 is 491863635112.

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

It can be written as a sum of positive squares in only one way, i.e., 180034733025 + 31501635169 = 424305^2 + 177487^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52884092047 + ... + 52884092050.

Almost surely, 2^211536368194 is an apocalyptic number.

211536368194 is a deficient number, since it is larger than the sum of its proper divisors (105768184100).

211536368194 is a wasteful number, since it uses less digits than its factorization.

211536368194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105768184099.

The product of its digits is 933120, while the sum is 49.

The spelling of 211536368194 in words is "two hundred eleven billion, five hundred thirty-six million, three hundred sixty-eight thousand, one hundred ninety-four".