77796782099 has 2 divisors, whose sum is σ = 77796782100. Its totient is φ = 77796782098.

The previous prime is 77796782081. The next prime is 77796782123. The reversal of 77796782099 is 99028769777.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77796782099 is a prime.

It is not a weakly prime, because it can be changed into another prime (77796788099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38898391049 + 38898391050.

It is an arithmetic number, because the mean of its divisors is an integer number (38898391050).

Almost surely, 2^77796782099 is an apocalyptic number.

77796782099 is a deficient number, since it is larger than the sum of its proper divisors (1).

77796782099 is an equidigital number, since it uses as much as digits as its factorization.

77796782099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168031584, while the sum is 71.

The spelling of 77796782099 in words is "seventy-seven billion, seven hundred ninety-six million, seven hundred eighty-two thousand, ninety-nine".