211687838368 has 24 divisors (see below), whose sum is σ = 417264426432. Its totient is φ = 105715920576.

The previous prime is 211687838309. The next prime is 211687838399. The reversal of 211687838368 is 863838786112.

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 in 3 ways as a sum of consecutive naturals, for example, 3973080 + ... + 4026007.

It is an arithmetic number, because the mean of its divisors is an integer number (17386017768).

Almost surely, 2^211687838368 is an apocalyptic number.

It is an amenable number.

211687838368 is a deficient number, since it is larger than the sum of its proper divisors (205576588064).

211687838368 is an equidigital number, since it uses as much as digits as its factorization.

211687838368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999924 (or 7999916 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

The spelling of 211687838368 in words is "two hundred eleven billion, six hundred eighty-seven million, eight hundred thirty-eight thousand, three hundred sixty-eight".