218041412811 has 4 divisors (see below), whose sum is σ = 290721883752. Its totient is φ = 145360941872.

The previous prime is 218041412807. The next prime is 218041412819. The reversal of 218041412811 is 118214140812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 218041412811 - 2² = 218041412807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218041412819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36340235466 + ... + 36340235471.

It is an arithmetic number, because the mean of its divisors is an integer number (72680470938).

Almost surely, 2^218041412811 is an apocalyptic number.

218041412811 is a deficient number, since it is larger than the sum of its proper divisors (72680470941).

218041412811 is an equidigital number, since it uses as much as digits as its factorization.

218041412811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72680470940.

The product of its (nonzero) digits is 4096, while the sum is 33.

The spelling of 218041412811 in words is "two hundred eighteen billion, forty-one million, four hundred twelve thousand, eight hundred eleven".