211536686871 has 6 divisors (see below), whose sum is σ = 305552992160. Its totient is φ = 141024457908.

The previous prime is 211536686869. The next prime is 211536686951. The reversal of 211536686871 is 178686635112.

It is a happy number.

211536686871 is a `hidden beast` number, since 21 + 1 + 536 + 6 + 8 + 6 + 87 + 1 = 666.

It is not a de Polignac number, because 211536686871 - 2¹ = 211536686869 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 (211536686831) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11752038151 + ... + 11752038168.

Almost surely, 2^211536686871 is an apocalyptic number.

211536686871 is a deficient number, since it is larger than the sum of its proper divisors (94016305289).

211536686871 is a wasteful number, since it uses less digits than its factorization.

211536686871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23504076325 (or 23504076322 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 211536686871 in words is "two hundred eleven billion, five hundred thirty-six million, six hundred eighty-six thousand, eight hundred seventy-one".