16868567021633 has 2 divisors, whose sum is σ = 16868567021634. Its totient is φ = 16868567021632.

The previous prime is 16868567021609. The next prime is 16868567021809. The reversal of 16868567021633 is 33612076586861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12412043363329 + 4456523658304 = 3523073^2 + 2111048^2 .

It is a cyclic number.

It is not a de Polignac number, because 16868567021633 - 2²⁸ = 16868298586177 is a prime.

It is not a weakly prime, because it can be changed into another prime (16868567021533) 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, 8434283510816 + 8434283510817.

It is an arithmetic number, because the mean of its divisors is an integer number (8434283510817).

Almost surely, 2^{16868567021633} is an apocalyptic number.

It is an amenable number.

16868567021633 is a deficient number, since it is larger than the sum of its proper divisors (1).

16868567021633 is an equidigital number, since it uses as much as digits as its factorization.

16868567021633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 16868567021633 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, six hundred thirty-three".