18618413641783 has 2 divisors, whose sum is σ = 18618413641784. Its totient is φ = 18618413641782.

The previous prime is 18618413641771. The next prime is 18618413641799. The reversal of 18618413641783 is 38714631481681.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18618413641783 - 2¹³ = 18618413633591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18618413641183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9309206820891 + 9309206820892.

It is an arithmetic number, because the mean of its divisors is an integer number (9309206820892).

Almost surely, 2^{18618413641783} is an apocalyptic number.

18618413641783 is a deficient number, since it is larger than the sum of its proper divisors (1).

18618413641783 is an equidigital number, since it uses as much as digits as its factorization.

18618413641783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 61.

The spelling of 18618413641783 in words is "eighteen trillion, six hundred eighteen billion, four hundred thirteen million, six hundred forty-one thousand, seven hundred eighty-three".