77964788813 has 2 divisors, whose sum is σ = 77964788814. Its totient is φ = 77964788812.

The previous prime is 77964788653. The next prime is 77964788827. The reversal of 77964788813 is 31888746977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74981225929 + 2983562884 = 273827^2 + 54622^2 .

It is an emirp because it is prime and its reverse (31888746977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77964788813 - 2³⁶ = 9245312077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77964788843) 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, 38982394406 + 38982394407.

It is an arithmetic number, because the mean of its divisors is an integer number (38982394407).

Almost surely, 2^77964788813 is an apocalyptic number.

It is an amenable number.

77964788813 is a deficient number, since it is larger than the sum of its proper divisors (1).

77964788813 is an equidigital number, since it uses as much as digits as its factorization.

77964788813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113799168, while the sum is 68.

The spelling of 77964788813 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, eight hundred thirteen".