218405740919 has 2 divisors, whose sum is σ = 218405740920. Its totient is φ = 218405740918.

The previous prime is 218405740913. The next prime is 218405740939. The reversal of 218405740919 is 919047504812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218405740919 - 2³² = 214110773623 is a prime.

It is a super-3 number, since 3×218405740919³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218405740913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109202870459 + 109202870460.

It is an arithmetic number, because the mean of its divisors is an integer number (109202870460).

Almost surely, 2^218405740919 is an apocalyptic number.

218405740919 is a deficient number, since it is larger than the sum of its proper divisors (1).

218405740919 is an equidigital number, since it uses as much as digits as its factorization.

218405740919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 218405740919 in words is "two hundred eighteen billion, four hundred five million, seven hundred forty thousand, nine hundred nineteen".