77398170077 has 2 divisors, whose sum is σ = 77398170078. Its totient is φ = 77398170076.

The previous prime is 77398170029. The next prime is 77398170131. The reversal of 77398170077 is 77007189377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57436436281 + 19961733796 = 239659^2 + 141286^2 .

It is an emirp because it is prime and its reverse (77007189377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77398170077 - 2²⁴ = 77381392861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77398170977) 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, 38699085038 + 38699085039.

It is an arithmetic number, because the mean of its divisors is an integer number (38699085039).

Almost surely, 2^77398170077 is an apocalyptic number.

It is an amenable number.

77398170077 is a deficient number, since it is larger than the sum of its proper divisors (1).

77398170077 is an equidigital number, since it uses as much as digits as its factorization.

77398170077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3630312, while the sum is 56.

The spelling of 77398170077 in words is "seventy-seven billion, three hundred ninety-eight million, one hundred seventy thousand, seventy-seven".