12388366780777 has 8 divisors (see below), whose sum is σ = 13342011864776. Its totient is φ = 11434820810112.

The previous prime is 12388366780667. The next prime is 12388366780787. The reversal of 12388366780777 is 77708766388321.

It can be written as a sum of positive squares in 4 ways, for example, as 36825226201 + 12351541554576 = 191899^2 + 3514476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12388366780777 - 2³¹ = 12386219297129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12388366780787) 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 in 7 ways as a sum of consecutive naturals, for example, 24518628 + ... + 25018789.

It is an arithmetic number, because the mean of its divisors is an integer number (1667751483097).

Almost surely, 2^{12388366780777} is an apocalyptic number.

It is an amenable number.

12388366780777 is a deficient number, since it is larger than the sum of its proper divisors (953645083999).

12388366780777 is a wasteful number, since it uses less digits than its factorization.

12388366780777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49556667.

The product of its (nonzero) digits is 796594176, while the sum is 73.

The spelling of 12388366780777 in words is "twelve trillion, three hundred eighty-eight billion, three hundred sixty-six million, seven hundred eighty thousand, seven hundred seventy-seven".