1218822870667 has 2 divisors, whose sum is σ = 1218822870668. Its totient is φ = 1218822870666.

The previous prime is 1218822870613. The next prime is 1218822870673. The reversal of 1218822870667 is 7660782288121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218822870667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218822870367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609411435333 + 609411435334.

It is an arithmetic number, because the mean of its divisors is an integer number (609411435334).

Almost surely, 2^{1218822870667} is an apocalyptic number.

1218822870667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218822870667 is an equidigital number, since it uses as much as digits as its factorization.

1218822870667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 1218822870667 in words is "one trillion, two hundred eighteen billion, eight hundred twenty-two million, eight hundred seventy thousand, six hundred sixty-seven".