12777542180869 has 2 divisors, whose sum is σ = 12777542180870. Its totient is φ = 12777542180868.

The previous prime is 12777542180833. The next prime is 12777542180911. The reversal of 12777542180869 is 96808124577721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9987255908644 + 2790286272225 = 3160262^2 + 1670415^2 .

It is a cyclic number.

It is not a de Polignac number, because 12777542180869 - 2³³ = 12768952246277 is a prime.

It is a super-2 number, since 2×12777542180869² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12777542180269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6388771090434 + 6388771090435.

It is an arithmetic number, because the mean of its divisors is an integer number (6388771090435).

Almost surely, 2^{12777542180869} is an apocalyptic number.

It is an amenable number.

12777542180869 is a deficient number, since it is larger than the sum of its proper divisors (1).

12777542180869 is an equidigital number, since it uses as much as digits as its factorization.

12777542180869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94832640, while the sum is 67.

The spelling of 12777542180869 in words is "twelve trillion, seven hundred seventy-seven billion, five hundred forty-two million, one hundred eighty thousand, eight hundred sixty-nine".