1218313734049 has 2 divisors, whose sum is σ = 1218313734050. Its totient is φ = 1218313734048.

The previous prime is 1218313734037. The next prime is 1218313734109. The reversal of 1218313734049 is 9404373138121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200898181025 + 17415553024 = 1095855^2 + 131968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218313734049 - 2⁹ = 1218313733537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218313734019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609156867024 + 609156867025.

It is an arithmetic number, because the mean of its divisors is an integer number (609156867025).

Almost surely, 2^{1218313734049} is an apocalyptic number.

It is an amenable number.

1218313734049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218313734049 is an equidigital number, since it uses as much as digits as its factorization.

1218313734049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 1218313734049 in words is "one trillion, two hundred eighteen billion, three hundred thirteen million, seven hundred thirty-four thousand, forty-nine".