7768115009 has 2 divisors, whose sum is σ = 7768115010. Its totient is φ = 7768115008.

The previous prime is 7768114993. The next prime is 7768115011. The reversal of 7768115009 is 9005118677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7681996609 + 86118400 = 87647^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 7768115009 - 2⁴ = 7768114993 is a prime.

It is a super-2 number, since 2×7768115009² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 7768115011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7768115029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3884057504 + 3884057505.

It is an arithmetic number, because the mean of its divisors is an integer number (3884057505).

Almost surely, 2^7768115009 is an apocalyptic number.

It is an amenable number.

7768115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7768115009 is an equidigital number, since it uses as much as digits as its factorization.

7768115009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 7768115009 is about 88136.9105936894. The cubic root of 7768115009 is about 1980.4864812350.

The spelling of 7768115009 in words is "seven billion, seven hundred sixty-eight million, one hundred fifteen thousand, nine".