211972746543 has 8 divisors (see below), whose sum is σ = 282632956800. Its totient is φ = 141313850328.

The previous prime is 211972746497. The next prime is 211972746571. The reversal of 211972746543 is 345647279112.

It is a happy number.

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

It is not a de Polignac number, because 211972746543 - 2²⁰ = 211971697967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211972741543) 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, 145668 + ... + 667206.

It is an arithmetic number, because the mean of its divisors is an integer number (35329119600).

Almost surely, 2^211972746543 is an apocalyptic number.

211972746543 is a deficient number, since it is larger than the sum of its proper divisors (70660210257).

211972746543 is a wasteful number, since it uses less digits than its factorization.

211972746543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657021.

The product of its digits is 2540160, while the sum is 51.

The spelling of 211972746543 in words is "two hundred eleven billion, nine hundred seventy-two million, seven hundred forty-six thousand, five hundred forty-three".