12018778509739 has 2 divisors, whose sum is σ = 12018778509740. Its totient is φ = 12018778509738.

The previous prime is 12018778509653. The next prime is 12018778509767. The reversal of 12018778509739 is 93790587781021.

12018778509739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12018778509739 - 2¹⁹ = 12018777985451 is a prime.

It is not a weakly prime, because it can be changed into another prime (12018778509139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009389254869 + 6009389254870.

It is an arithmetic number, because the mean of its divisors is an integer number (6009389254870).

Almost surely, 2^{12018778509739} is an apocalyptic number.

12018778509739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12018778509739 is an equidigital number, since it uses as much as digits as its factorization.

12018778509739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53343360, while the sum is 67.

The spelling of 12018778509739 in words is "twelve trillion, eighteen billion, seven hundred seventy-eight million, five hundred nine thousand, seven hundred thirty-nine".