211986745788 has 24 divisors (see below), whose sum is σ = 495015973200. Its totient is φ = 70607929600.

The previous prime is 211986745787. The next prime is 211986745837. The reversal of 211986745788 is 887547689112.

211986745788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211986745788² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211986745781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6773613 + ... + 6804836.

It is an arithmetic number, because the mean of its divisors is an integer number (20625665550).

Almost surely, 2^211986745788 is an apocalyptic number.

It is an amenable number.

211986745788 is an abundant number, since it is smaller than the sum of its proper divisors (283029227412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211986745788 is a wasteful number, since it uses less digits than its factorization.

211986745788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13579757 (or 13579755 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 66.

The spelling of 211986745788 in words is "two hundred eleven billion, nine hundred eighty-six million, seven hundred forty-five thousand, seven hundred eighty-eight".