1218139590847 has 2 divisors, whose sum is σ = 1218139590848. Its totient is φ = 1218139590846.

The previous prime is 1218139590793. The next prime is 1218139590853. The reversal of 1218139590847 is 7480959318121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218139590847 - 2¹⁵ = 1218139558079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1218139590791 and 1218139590800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218139590887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609069795423 + 609069795424.

It is an arithmetic number, because the mean of its divisors is an integer number (609069795424).

Almost surely, 2^{1218139590847} is an apocalyptic number.

1218139590847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218139590847 is an equidigital number, since it uses as much as digits as its factorization.

1218139590847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 1218139590847 in words is "one trillion, two hundred eighteen billion, one hundred thirty-nine million, five hundred ninety thousand, eight hundred forty-seven".