4218806591939 has 2 divisors, whose sum is σ = 4218806591940. Its totient is φ = 4218806591938.

The previous prime is 4218806591917. The next prime is 4218806592017. The reversal of 4218806591939 is 9391956088124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4218806591939 - 2⁸ = 4218806591683 is a prime.

It is not a weakly prime, because it can be changed into another prime (4218806597939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109403295969 + 2109403295970.

It is an arithmetic number, because the mean of its divisors is an integer number (2109403295970).

Almost surely, 2^{4218806591939} is an apocalyptic number.

4218806591939 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218806591939 is an equidigital number, since it uses as much as digits as its factorization.

4218806591939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33592320, while the sum is 65.

The spelling of 4218806591939 in words is "four trillion, two hundred eighteen billion, eight hundred six million, five hundred ninety-one thousand, nine hundred thirty-nine".