12718315018861 has 16 divisors (see below), whose sum is σ = 13085997710400. Its totient is φ = 12351901292928.

The previous prime is 12718315018837. The next prime is 12718315018897. The reversal of 12718315018861 is 16881051381721.

It is a happy number.

12718315018861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12718315018861 - 2⁹ = 12718315018349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12718315018799 and 12718315018808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12718315018811) 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, 109716150 + ... + 109832008.

It is an arithmetic number, because the mean of its divisors is an integer number (817874856900).

Almost surely, 2^{12718315018861} is an apocalyptic number.

It is an amenable number.

12718315018861 is a deficient number, since it is larger than the sum of its proper divisors (367682691539).

12718315018861 is a wasteful number, since it uses less digits than its factorization.

12718315018861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121308.

The product of its (nonzero) digits is 645120, while the sum is 52.

The spelling of 12718315018861 in words is "twelve trillion, seven hundred eighteen billion, three hundred fifteen million, eighteen thousand, eight hundred sixty-one".