65820647244013 has 2 divisors, whose sum is σ = 65820647244014. Its totient is φ = 65820647244012.

The previous prime is 65820647243999. The next prime is 65820647244019. The reversal of 65820647244013 is 31044274602856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45492839646244 + 20327807597769 = 6744838^2 + 4508637^2 .

It is a cyclic number.

It is not a de Polignac number, because 65820647244013 - 2⁹ = 65820647243501 is a prime.

It is a super-2 number, since 2×65820647244013² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65820647244019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32910323622006 + 32910323622007.

It is an arithmetic number, because the mean of its divisors is an integer number (32910323622007).

Almost surely, 2^{65820647244013} is an apocalyptic number.

It is an amenable number.

65820647244013 is a deficient number, since it is larger than the sum of its proper divisors (1).

65820647244013 is an equidigital number, since it uses as much as digits as its factorization.

65820647244013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 65820647244013 in words is "sixty-five trillion, eight hundred twenty billion, six hundred forty-seven million, two hundred forty-four thousand, thirteen".