77057854877 has 2 divisors, whose sum is σ = 77057854878. Its totient is φ = 77057854876.

The previous prime is 77057854859. The next prime is 77057854943. The reversal of 77057854877 is 77845875077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76940219161 + 117635716 = 277381^2 + 10846^2 .

It is a cyclic number.

It is not a de Polignac number, because 77057854877 - 2¹⁰ = 77057853853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77057853877) 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, 38528927438 + 38528927439.

It is an arithmetic number, because the mean of its divisors is an integer number (38528927439).

Almost surely, 2^77057854877 is an apocalyptic number.

It is an amenable number.

77057854877 is a deficient number, since it is larger than the sum of its proper divisors (1).

77057854877 is an equidigital number, since it uses as much as digits as its factorization.

77057854877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107564800, while the sum is 65.

The spelling of 77057854877 in words is "seventy-seven billion, fifty-seven million, eight hundred fifty-four thousand, eight hundred seventy-seven".