7865120566013 has 2 divisors, whose sum is σ = 7865120566014. Its totient is φ = 7865120566012.

The previous prime is 7865120565977. The next prime is 7865120566063. The reversal of 7865120566013 is 3106650215687.

It is an a-pointer prime, because the next prime (7865120566063) can be obtained adding 7865120566013 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6829535502244 + 1035585063769 = 2613338^2 + 1017637^2 .

It is a cyclic number.

It is not a de Polignac number, because 7865120566013 - 2⁶ = 7865120565949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7865120566063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3932560283006 + 3932560283007.

It is an arithmetic number, because the mean of its divisors is an integer number (3932560283007).

Almost surely, 2^{7865120566013} is an apocalyptic number.

It is an amenable number.

7865120566013 is a deficient number, since it is larger than the sum of its proper divisors (1).

7865120566013 is an equidigital number, since it uses as much as digits as its factorization.

7865120566013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 7865120566013 in words is "seven trillion, eight hundred sixty-five billion, one hundred twenty million, five hundred sixty-six thousand, thirteen".