211145907818 has 8 divisors (see below), whose sum is σ = 317199468960. Its totient is φ = 105412751500.

The previous prime is 211145907811. The next prime is 211145907871. The reversal of 211145907818 is 818709541112.

211145907818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-4 number, since 4×211145907818⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211145907811) 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 3 ways as a sum of consecutive naturals, for example, 80099558 + ... + 80102193.

It is an arithmetic number, because the mean of its divisors is an integer number (39649933620).

Almost surely, 2^211145907818 is an apocalyptic number.

211145907818 is a deficient number, since it is larger than the sum of its proper divisors (106053561142).

211145907818 is a wasteful number, since it uses less digits than its factorization.

211145907818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160202412.

The product of its (nonzero) digits is 161280, while the sum is 47.

The spelling of 211145907818 in words is "two hundred eleven billion, one hundred forty-five million, nine hundred seven thousand, eight hundred eighteen".