77814368173 has 2 divisors, whose sum is σ = 77814368174. Its totient is φ = 77814368172.

The previous prime is 77814368113. The next prime is 77814368257. The reversal of 77814368173 is 37186341877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47872564804 + 29941803369 = 218798^2 + 173037^2 .

It is a cyclic number.

It is not a de Polignac number, because 77814368173 - 2¹⁷ = 77814237101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77814368113) 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, 38907184086 + 38907184087.

It is an arithmetic number, because the mean of its divisors is an integer number (38907184087).

Almost surely, 2^77814368173 is an apocalyptic number.

It is an amenable number.

77814368173 is a deficient number, since it is larger than the sum of its proper divisors (1).

77814368173 is an equidigital number, since it uses as much as digits as its factorization.

77814368173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 55.

The spelling of 77814368173 in words is "seventy-seven billion, eight hundred fourteen million, three hundred sixty-eight thousand, one hundred seventy-three".