211689688804 has 96 divisors (see below), whose sum is σ = 415686297600. Its totient is φ = 93504428160.

The previous prime is 211689688801. The next prime is 211689688807. The reversal of 211689688804 is 408886986112.

It is an interprime number because it is at equal distance from previous prime (211689688801) and next prime (211689688807).

It is not an unprimeable number, because it can be changed into a prime (211689688801) 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 31 ways as a sum of consecutive naturals, for example, 246436927 + ... + 246437785.

It is an arithmetic number, because the mean of its divisors is an integer number (4330065600).

Almost surely, 2^211689688804 is an apocalyptic number.

It is an amenable number.

211689688804 is a deficient number, since it is larger than the sum of its proper divisors (203996608796).

211689688804 is a wasteful number, since it uses less digits than its factorization.

211689688804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 61.

The spelling of 211689688804 in words is "two hundred eleven billion, six hundred eighty-nine million, six hundred eighty-eight thousand, eight hundred four".