211688455893 has 8 divisors (see below), whose sum is σ = 283729030656. Its totient is φ = 140386759200.

The previous prime is 211688455873. The next prime is 211688455897. The reversal of 211688455893 is 398554886112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211688455893 - 2¹⁰ = 211688454869 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211688455897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184718848 + ... + 184719993.

It is an arithmetic number, because the mean of its divisors is an integer number (35466128832).

Almost surely, 2^211688455893 is an apocalyptic number.

It is an amenable number.

211688455893 is a deficient number, since it is larger than the sum of its proper divisors (72040574763).

211688455893 is a wasteful number, since it uses less digits than its factorization.

211688455893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369439035.

The product of its digits is 16588800, while the sum is 60.

The spelling of 211688455893 in words is "two hundred eleven billion, six hundred eighty-eight million, four hundred fifty-five thousand, eight hundred ninety-three".