5209918804841 has 2 divisors, whose sum is σ = 5209918804842. Its totient is φ = 5209918804840.

The previous prime is 5209918804819. The next prime is 5209918804931. The reversal of 5209918804841 is 1484088199025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4136200075225 + 1073718729616 = 2033765^2 + 1036204^2 .

It is a cyclic number.

It is not a de Polignac number, because 5209918804841 - 2¹⁴ = 5209918788457 is a prime.

It is not a weakly prime, because it can be changed into another prime (5209918854841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604959402420 + 2604959402421.

It is an arithmetic number, because the mean of its divisors is an integer number (2604959402421).

Almost surely, 2^{5209918804841} is an apocalyptic number.

It is an amenable number.

5209918804841 is a deficient number, since it is larger than the sum of its proper divisors (1).

5209918804841 is an equidigital number, since it uses as much as digits as its factorization.

5209918804841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 59.

The spelling of 5209918804841 in words is "five trillion, two hundred nine billion, nine hundred eighteen million, eight hundred four thousand, eight hundred forty-one".