100768788509 has 2 divisors, whose sum is σ = 100768788510. Its totient is φ = 100768788508.

The previous prime is 100768788451. The next prime is 100768788539. The reversal of 100768788509 is 905887867001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61245360484 + 39523428025 = 247478^2 + 198805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100768788509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100768788539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50384394254 + 50384394255.

It is an arithmetic number, because the mean of its divisors is an integer number (50384394255).

Almost surely, 2^100768788509 is an apocalyptic number.

It is an amenable number.

100768788509 is a deficient number, since it is larger than the sum of its proper divisors (1).

100768788509 is an equidigital number, since it uses as much as digits as its factorization.

100768788509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 59.

The spelling of 100768788509 in words is "one hundred billion, seven hundred sixty-eight million, seven hundred eighty-eight thousand, five hundred nine".