218936279377 has 2 divisors, whose sum is σ = 218936279378. Its totient is φ = 218936279376.

The previous prime is 218936279369. The next prime is 218936279381. The reversal of 218936279377 is 773972639812.

218936279377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215021399616 + 3914879761 = 463704^2 + 62569^2 .

It is a cyclic number.

It is not a de Polignac number, because 218936279377 - 2³ = 218936279369 is a prime.

It is not a weakly prime, because it can be changed into another prime (218936279327) 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 as a sum of consecutive naturals, namely, 109468139688 + 109468139689.

It is an arithmetic number, because the mean of its divisors is an integer number (109468139689).

Almost surely, 2^218936279377 is an apocalyptic number.

It is an amenable number.

218936279377 is a deficient number, since it is larger than the sum of its proper divisors (1).

218936279377 is an equidigital number, since it uses as much as digits as its factorization.

218936279377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48009024, while the sum is 64.

The spelling of 218936279377 in words is "two hundred eighteen billion, nine hundred thirty-six million, two hundred seventy-nine thousand, three hundred seventy-seven".