77368877917 has 2 divisors, whose sum is σ = 77368877918. Its totient is φ = 77368877916.

The previous prime is 77368877903. The next prime is 77368877941. The reversal of 77368877917 is 71977886377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58305829156 + 19063048761 = 241466^2 + 138069^2 .

It is a cyclic number.

It is not a de Polignac number, because 77368877917 - 2²⁷ = 77234660189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77368887917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38684438958 + 38684438959.

It is an arithmetic number, because the mean of its divisors is an integer number (38684438959).

Almost surely, 2^77368877917 is an apocalyptic number.

It is an amenable number.

77368877917 is a deficient number, since it is larger than the sum of its proper divisors (1).

77368877917 is an equidigital number, since it uses as much as digits as its factorization.

77368877917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174254976, while the sum is 70.

The spelling of 77368877917 in words is "seventy-seven billion, three hundred sixty-eight million, eight hundred seventy-seven thousand, nine hundred seventeen".