1618558326443 has 2 divisors, whose sum is σ = 1618558326444. Its totient is φ = 1618558326442.

The previous prime is 1618558326397. The next prime is 1618558326449. The reversal of 1618558326443 is 3446238558161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618558326443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1618558326449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809279163221 + 809279163222.

It is an arithmetic number, because the mean of its divisors is an integer number (809279163222).

Almost surely, 2^{1618558326443} is an apocalyptic number.

1618558326443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618558326443 is an equidigital number, since it uses as much as digits as its factorization.

1618558326443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16588800, while the sum is 56.

The spelling of 1618558326443 in words is "one trillion, six hundred eighteen billion, five hundred fifty-eight million, three hundred twenty-six thousand, four hundred forty-three".