516565651493 has 2 divisors, whose sum is σ = 516565651494. Its totient is φ = 516565651492.

The previous prime is 516565651423. The next prime is 516565651513. The reversal of 516565651493 is 394156565615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462614904964 + 53950746529 = 680158^2 + 232273^2 .

It is a cyclic number.

It is not a de Polignac number, because 516565651493 - 2⁸ = 516565651237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516565651423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258282825746 + 258282825747.

It is an arithmetic number, because the mean of its divisors is an integer number (258282825747).

Almost surely, 2^516565651493 is an apocalyptic number.

It is an amenable number.

516565651493 is a deficient number, since it is larger than the sum of its proper divisors (1).

516565651493 is an equidigital number, since it uses as much as digits as its factorization.

516565651493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580000, while the sum is 56.

The spelling of 516565651493 in words is "five hundred sixteen billion, five hundred sixty-five million, six hundred fifty-one thousand, four hundred ninety-three".