12684364157878 has 32 divisors (see below), whose sum is σ = 22435232762880. Its totient is φ = 5265411704640.

The previous prime is 12684364157873. The next prime is 12684364157893. The reversal of 12684364157878 is 87875146348621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684364157873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79410126 + ... + 79569697.

It is an arithmetic number, because the mean of its divisors is an integer number (701101023840).

Almost surely, 2^{12684364157878} is an apocalyptic number.

12684364157878 is a deficient number, since it is larger than the sum of its proper divisors (9750868605002).

12684364157878 is a wasteful number, since it uses less digits than its factorization.

12684364157878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158980012.

The product of its digits is 433520640, while the sum is 70.

The spelling of 12684364157878 in words is "twelve trillion, six hundred eighty-four billion, three hundred sixty-four million, one hundred fifty-seven thousand, eight hundred seventy-eight".