418418440409 has 2 divisors, whose sum is σ = 418418440410. Its totient is φ = 418418440408.

The previous prime is 418418440343. The next prime is 418418440459. The reversal of 418418440409 is 904044814814.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264224784784 + 154193655625 = 514028^2 + 392675^2 .

It is a cyclic number.

It is not a de Polignac number, because 418418440409 - 2²⁴ = 418401663193 is a prime.

It is not a weakly prime, because it can be changed into another prime (418418440459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209209220204 + 209209220205.

It is an arithmetic number, because the mean of its divisors is an integer number (209209220205).

Almost surely, 2^418418440409 is an apocalyptic number.

It is an amenable number.

418418440409 is a deficient number, since it is larger than the sum of its proper divisors (1).

418418440409 is an equidigital number, since it uses as much as digits as its factorization.

418418440409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 418418440409 in words is "four hundred eighteen billion, four hundred eighteen million, four hundred forty thousand, four hundred nine".