7130786515621 has 2 divisors, whose sum is σ = 7130786515622. Its totient is φ = 7130786515620.

The previous prime is 7130786515579. The next prime is 7130786515649. The reversal of 7130786515621 is 1265156870317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4912739260900 + 2218047254721 = 2216470^2 + 1489311^2 .

It is an emirp because it is prime and its reverse (1265156870317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7130786515621 - 2¹⁹ = 7130785991333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7130786515691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3565393257810 + 3565393257811.

It is an arithmetic number, because the mean of its divisors is an integer number (3565393257811).

Almost surely, 2^{7130786515621} is an apocalyptic number.

It is an amenable number.

7130786515621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7130786515621 is an equidigital number, since it uses as much as digits as its factorization.

7130786515621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 7130786515621 in words is "seven trillion, one hundred thirty billion, seven hundred eighty-six million, five hundred fifteen thousand, six hundred twenty-one".