218449254811 has 2 divisors, whose sum is σ = 218449254812. Its totient is φ = 218449254810.

The previous prime is 218449254797. The next prime is 218449254923. The reversal of 218449254811 is 118452944812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218449254811 - 2¹⁹ = 218448730523 is a prime.

It is not a weakly prime, because it can be changed into another prime (218444254811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109224627405 + 109224627406.

It is an arithmetic number, because the mean of its divisors is an integer number (109224627406).

Almost surely, 2^218449254811 is an apocalyptic number.

218449254811 is a deficient number, since it is larger than the sum of its proper divisors (1).

218449254811 is an equidigital number, since it uses as much as digits as its factorization.

218449254811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 737280, while the sum is 49.

The spelling of 218449254811 in words is "two hundred eighteen billion, four hundred forty-nine million, two hundred fifty-four thousand, eight hundred eleven".