77384648377 has 2 divisors, whose sum is σ = 77384648378. Its totient is φ = 77384648376.

The previous prime is 77384648347. The next prime is 77384648381.

77384648377 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62748246016 + 14636402361 = 250496^2 + 120981^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 77384648377 - 2¹¹ = 77384646329 is a prime.

It is not a weakly prime, because it can be changed into another prime (77384648347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38692324188 + 38692324189.

It is an arithmetic number, because the mean of its divisors is an integer number (38692324189).

Almost surely, 2^77384648377 is an apocalyptic number.

It is an amenable number.

77384648377 is a deficient number, since it is larger than the sum of its proper divisors (1).

77384648377 is an equidigital number, since it uses as much as digits as its factorization.

77384648377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132765696, while the sum is 64.

The spelling of 77384648377 in words is "seventy-seven billion, three hundred eighty-four million, six hundred forty-eight thousand, three hundred seventy-seven".