1216824885943 has 2 divisors, whose sum is σ = 1216824885944. Its totient is φ = 1216824885942.

The previous prime is 1216824885917. The next prime is 1216824885967. The reversal of 1216824885943 is 3495884286121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216824885943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216824883943) 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, 608412442971 + 608412442972.

It is an arithmetic number, because the mean of its divisors is an integer number (608412442972).

Almost surely, 2^{1216824885943} is an apocalyptic number.

1216824885943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216824885943 is an equidigital number, since it uses as much as digits as its factorization.

1216824885943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26542080, while the sum is 61.

The spelling of 1216824885943 in words is "one trillion, two hundred sixteen billion, eight hundred twenty-four million, eight hundred eighty-five thousand, nine hundred forty-three".