77398289377 has 2 divisors, whose sum is σ = 77398289378. Its totient is φ = 77398289376.

The previous prime is 77398289357. The next prime is 77398289411.

77398289377 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75352446016 + 2045843361 = 274504^2 + 45231^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 77398289377 - 2¹⁹ = 77397765089 is a prime.

It is not a weakly prime, because it can be changed into another prime (77398289357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38699144688 + 38699144689.

It is an arithmetic number, because the mean of its divisors is an integer number (38699144689).

Almost surely, 2^77398289377 is an apocalyptic number.

It is an amenable number.

77398289377 is a deficient number, since it is larger than the sum of its proper divisors (1).

77398289377 is an equidigital number, since it uses as much as digits as its factorization.

77398289377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224042112, while the sum is 70.

The spelling of 77398289377 in words is "seventy-seven billion, three hundred ninety-eight million, two hundred eighty-nine thousand, three hundred seventy-seven".