211986745838 has 32 divisors (see below), whose sum is σ = 367042690560. Its totient is φ = 89942775840.

The previous prime is 211986745837. The next prime is 211986745853. The reversal of 211986745838 is 838547689112.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211986745837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5302508 + ... + 5342336.

It is an arithmetic number, because the mean of its divisors is an integer number (11470084080).

Almost surely, 2^211986745838 is an apocalyptic number.

211986745838 is a deficient number, since it is larger than the sum of its proper divisors (155055944722).

211986745838 is a wasteful number, since it uses less digits than its factorization.

211986745838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43632.

The product of its digits is 23224320, while the sum is 62.

The spelling of 211986745838 in words is "two hundred eleven billion, nine hundred eighty-six million, seven hundred forty-five thousand, eight hundred thirty-eight".