77039657777 has 2 divisors, whose sum is σ = 77039657778. Its totient is φ = 77039657776.

The previous prime is 77039657753. The next prime is 77039657791. The reversal of 77039657777 is 77775693077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73807848976 + 3231808801 = 271676^2 + 56849^2 .

It is a cyclic number.

It is not a de Polignac number, because 77039657777 - 2¹² = 77039653681 is a prime.

It is not a weakly prime, because it can be changed into another prime (77039657677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38519828888 + 38519828889.

It is an arithmetic number, because the mean of its divisors is an integer number (38519828889).

Almost surely, 2^77039657777 is an apocalyptic number.

It is an amenable number.

77039657777 is a deficient number, since it is larger than the sum of its proper divisors (1).

77039657777 is an equidigital number, since it uses as much as digits as its factorization.

77039657777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95295690, while the sum is 65.

The spelling of 77039657777 in words is "seventy-seven billion, thirty-nine million, six hundred fifty-seven thousand, seven hundred seventy-seven".