12018778509653 has 2 divisors, whose sum is σ = 12018778509654. Its totient is φ = 12018778509652.

The previous prime is 12018778509643. The next prime is 12018778509739. The reversal of 12018778509653 is 35690587781021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10865349765169 + 1153428744484 = 3296263^2 + 1073978^2 .

It is a cyclic number.

It is not a de Polignac number, because 12018778509653 - 2¹⁰ = 12018778508629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12018778509643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009389254826 + 6009389254827.

It is an arithmetic number, because the mean of its divisors is an integer number (6009389254827).

Almost surely, 2^{12018778509653} is an apocalyptic number.

It is an amenable number.

12018778509653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12018778509653 is an equidigital number, since it uses as much as digits as its factorization.

12018778509653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 12018778509653 in words is "twelve trillion, eighteen billion, seven hundred seventy-eight million, five hundred nine thousand, six hundred fifty-three".