12813807778834 has 16 divisors (see below), whose sum is σ = 19419375644928. Its totient is φ = 6340686049152.

The previous prime is 12813807778831. The next prime is 12813807778873. The reversal of 12813807778834 is 43887770831821.

It is a self number, because there is not a number n which added to its sum of digits gives 12813807778834.

It is not an unprimeable number, because it can be changed into a prime (12813807778831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6668907 + ... + 8372689.

It is an arithmetic number, because the mean of its divisors is an integer number (1213710977808).

Almost surely, 2^{12813807778834} is an apocalyptic number.

12813807778834 is a deficient number, since it is larger than the sum of its proper divisors (6605567866094).

12813807778834 is a wasteful number, since it uses less digits than its factorization.

12813807778834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742649.

The product of its (nonzero) digits is 101154816, while the sum is 67.

The spelling of 12813807778834 in words is "twelve trillion, eight hundred thirteen billion, eight hundred seven million, seven hundred seventy-eight thousand, eight hundred thirty-four".