65838103892809 has 2 divisors, whose sum is σ = 65838103892810. Its totient is φ = 65838103892808.

The previous prime is 65838103892711. The next prime is 65838103892887. The reversal of 65838103892809 is 90829830183856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40101151507209 + 25736952385600 = 6332547^2 + 5073160^2 .

It is a cyclic number.

It is not a de Polignac number, because 65838103892809 - 2³¹ = 65835956409161 is a prime.

It is not a weakly prime, because it can be changed into another prime (65838103892609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32919051946404 + 32919051946405.

It is an arithmetic number, because the mean of its divisors is an integer number (32919051946405).

Almost surely, 2^{65838103892809} is an apocalyptic number.

It is an amenable number.

65838103892809 is a deficient number, since it is larger than the sum of its proper divisors (1).

65838103892809 is an equidigital number, since it uses as much as digits as its factorization.

65838103892809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179159040, while the sum is 70.

The spelling of 65838103892809 in words is "sixty-five trillion, eight hundred thirty-eight billion, one hundred three million, eight hundred ninety-two thousand, eight hundred nine".