768783500509 has 2 divisors, whose sum is σ = 768783500510. Its totient is φ = 768783500508.

The previous prime is 768783500483. The next prime is 768783500531. The reversal of 768783500509 is 905005387867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456746188900 + 312037311609 = 675830^2 + 558603^2 .

It is a cyclic number.

It is not a de Polignac number, because 768783500509 - 2⁵ = 768783500477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768783506509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384391750254 + 384391750255.

It is an arithmetic number, because the mean of its divisors is an integer number (384391750255).

Almost surely, 2^768783500509 is an apocalyptic number.

It is an amenable number.

768783500509 is a deficient number, since it is larger than the sum of its proper divisors (1).

768783500509 is an equidigital number, since it uses as much as digits as its factorization.

768783500509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 768783500509 in words is "seven hundred sixty-eight billion, seven hundred eighty-three million, five hundred thousand, five hundred nine".