218406097087 has 2 divisors, whose sum is σ = 218406097088. Its totient is φ = 218406097086.

The previous prime is 218406097069. The next prime is 218406097111. The reversal of 218406097087 is 780790604812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218406097087 - 2¹⁵ = 218406064319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218406397087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109203048543 + 109203048544.

It is an arithmetic number, because the mean of its divisors is an integer number (109203048544).

Almost surely, 2^218406097087 is an apocalyptic number.

218406097087 is a deficient number, since it is larger than the sum of its proper divisors (1).

218406097087 is an equidigital number, since it uses as much as digits as its factorization.

218406097087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 218406097087 in words is "two hundred eighteen billion, four hundred six million, ninety-seven thousand, eighty-seven".