77366231849 has 2 divisors, whose sum is σ = 77366231850. Its totient is φ = 77366231848.

The previous prime is 77366231791. The next prime is 77366231867. The reversal of 77366231849 is 94813266377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58064131225 + 19302100624 = 240965^2 + 138932^2 .

It is an emirp because it is prime and its reverse (94813266377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77366231849 - 2¹⁶ = 77366166313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77366231794 and 77366231803.

It is not a weakly prime, because it can be changed into another prime (77366230849) 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, 38683115924 + 38683115925.

It is an arithmetic number, because the mean of its divisors is an integer number (38683115925).

Almost surely, 2^77366231849 is an apocalyptic number.

It is an amenable number.

77366231849 is a deficient number, since it is larger than the sum of its proper divisors (1).

77366231849 is an equidigital number, since it uses as much as digits as its factorization.

77366231849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 56.

The spelling of 77366231849 in words is "seventy-seven billion, three hundred sixty-six million, two hundred thirty-one thousand, eight hundred forty-nine".