65838103892609 has 2 divisors, whose sum is σ = 65838103892610. Its totient is φ = 65838103892608.

The previous prime is 65838103892591. The next prime is 65838103892647. The reversal of 65838103892609 is 90629830183856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55505897251984 + 10332206640625 = 7450228^2 + 3214375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65838103892609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65838103892689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32919051946304 + 32919051946305.

It is an arithmetic number, because the mean of its divisors is an integer number (32919051946305).

Almost surely, 2^{65838103892609} is an apocalyptic number.

It is an amenable number.

65838103892609 is a deficient number, since it is larger than the sum of its proper divisors (1).

65838103892609 is an equidigital number, since it uses as much as digits as its factorization.

65838103892609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134369280, while the sum is 68.

The spelling of 65838103892609 in words is "sixty-five trillion, eight hundred thirty-eight billion, one hundred three million, eight hundred ninety-two thousand, six hundred nine".