77315064049 has 2 divisors, whose sum is σ = 77315064050. Its totient is φ = 77315064048.

The previous prime is 77315064011. The next prime is 77315064077. The reversal of 77315064049 is 94046051377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58438227600 + 18876836449 = 241740^2 + 137393^2 .

It is a cyclic number.

It is not a de Polignac number, because 77315064049 - 2¹¹ = 77315062001 is a prime.

It is not a weakly prime, because it can be changed into another prime (77315064089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38657532024 + 38657532025.

It is an arithmetic number, because the mean of its divisors is an integer number (38657532025).

Almost surely, 2^77315064049 is an apocalyptic number.

It is an amenable number.

77315064049 is a deficient number, since it is larger than the sum of its proper divisors (1).

77315064049 is an equidigital number, since it uses as much as digits as its factorization.

77315064049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 77315064049 in words is "seventy-seven billion, three hundred fifteen million, sixty-four thousand, forty-nine".