77755023377 has 2 divisors, whose sum is σ = 77755023378. Its totient is φ = 77755023376.

The previous prime is 77755023341. The next prime is 77755023397. The reversal of 77755023377 is 77332055777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58730614336 + 19024409041 = 242344^2 + 137929^2 .

It is a cyclic number.

It is not a de Polignac number, because 77755023377 - 2¹⁰ = 77755022353 is a prime.

It is not a weakly prime, because it can be changed into another prime (77755023397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38877511688 + 38877511689.

It is an arithmetic number, because the mean of its divisors is an integer number (38877511689).

Almost surely, 2^77755023377 is an apocalyptic number.

It is an amenable number.

77755023377 is a deficient number, since it is larger than the sum of its proper divisors (1).

77755023377 is an equidigital number, since it uses as much as digits as its factorization.

77755023377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7563150, while the sum is 53.

The spelling of 77755023377 in words is "seventy-seven billion, seven hundred fifty-five million, twenty-three thousand, three hundred seventy-seven".