218394157747 has 2 divisors, whose sum is σ = 218394157748. Its totient is φ = 218394157746.

The previous prime is 218394157733. The next prime is 218394157753. The reversal of 218394157747 is 747751493812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218394157747 - 2³¹ = 216246674099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218394157691 and 218394157700.

It is not a weakly prime, because it can be changed into another prime (218394157717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109197078873 + 109197078874.

It is an arithmetic number, because the mean of its divisors is an integer number (109197078874).

Almost surely, 2^218394157747 is an apocalyptic number.

218394157747 is a deficient number, since it is larger than the sum of its proper divisors (1).

218394157747 is an equidigital number, since it uses as much as digits as its factorization.

218394157747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 58.

The spelling of 218394157747 in words is "two hundred eighteen billion, three hundred ninety-four million, one hundred fifty-seven thousand, seven hundred forty-seven".