77349317777 has 2 divisors, whose sum is σ = 77349317778. Its totient is φ = 77349317776.

The previous prime is 77349317723. The next prime is 77349317779. The reversal of 77349317777 is 77771394377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69124823056 + 8224494721 = 262916^2 + 90689^2 .

It is a cyclic number.

It is not a de Polignac number, because 77349317777 - 2²⁴ = 77332540561 is a prime.

Together with 77349317779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77349317779) 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, 38674658888 + 38674658889.

It is an arithmetic number, because the mean of its divisors is an integer number (38674658889).

Almost surely, 2^77349317777 is an apocalyptic number.

It is an amenable number.

77349317777 is a deficient number, since it is larger than the sum of its proper divisors (1).

77349317777 is an equidigital number, since it uses as much as digits as its factorization.

77349317777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38118276, while the sum is 62.

The spelling of 77349317777 in words is "seventy-seven billion, three hundred forty-nine million, three hundred seventeen thousand, seven hundred seventy-seven".