516865420787 has 2 divisors, whose sum is σ = 516865420788. Its totient is φ = 516865420786.

The previous prime is 516865420763. The next prime is 516865420817. The reversal of 516865420787 is 787024568615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516865420787 - 2¹⁸ = 516865158643 is a prime.

It is not a weakly prime, because it can be changed into another prime (516865426787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258432710393 + 258432710394.

It is an arithmetic number, because the mean of its divisors is an integer number (258432710394).

Almost surely, 2^516865420787 is an apocalyptic number.

516865420787 is a deficient number, since it is larger than the sum of its proper divisors (1).

516865420787 is an equidigital number, since it uses as much as digits as its factorization.

516865420787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 516865420787 in words is "five hundred sixteen billion, eight hundred sixty-five million, four hundred twenty thousand, seven hundred eighty-seven".