16868567021438 has 16 divisors (see below), whose sum is σ = 27606224411136. Its totient is φ = 7666665258840.

The previous prime is 16868567021437. The next prime is 16868567021473. The reversal of 16868567021438 is 83412076586861.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868567021437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43060856 + ... + 43450827.

It is an arithmetic number, because the mean of its divisors is an integer number (1725389025696).

Almost surely, 2^{16868567021438} is an apocalyptic number.

16868567021438 is a deficient number, since it is larger than the sum of its proper divisors (10737657389698).

16868567021438 is a wasteful number, since it uses less digits than its factorization.

16868567021438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86520559.

The product of its (nonzero) digits is 92897280, while the sum is 65.

The spelling of 16868567021438 in words is "sixteen trillion, eight hundred sixty-eight billion, five hundred sixty-seven million, twenty-one thousand, four hundred thirty-eight".