4081818564793 has 2 divisors, whose sum is σ = 4081818564794. Its totient is φ = 4081818564792.

The previous prime is 4081818564737. The next prime is 4081818564799. The reversal of 4081818564793 is 3974658181804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2401173383184 + 1680645181609 = 1549572^2 + 1296397^2 .

It is a cyclic number.

It is not a de Polignac number, because 4081818564793 - 2⁹ = 4081818564281 is a prime.

It is a super-2 number, since 2×4081818564793² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4081818564799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2040909282396 + 2040909282397.

It is an arithmetic number, because the mean of its divisors is an integer number (2040909282397).

Almost surely, 2^{4081818564793} is an apocalyptic number.

It is an amenable number.

4081818564793 is a deficient number, since it is larger than the sum of its proper divisors (1).

4081818564793 is an equidigital number, since it uses as much as digits as its factorization.

4081818564793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 4081818564793 in words is "four trillion, eighty-one billion, eight hundred eighteen million, five hundred sixty-four thousand, seven hundred ninety-three".