16878416483891 has 2 divisors, whose sum is σ = 16878416483892. Its totient is φ = 16878416483890.

The previous prime is 16878416483867. The next prime is 16878416483911. The reversal of 16878416483891 is 19838461487861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16878416483891 - 2⁴² = 12480369972787 is a prime.

It is not a weakly prime, because it can be changed into another prime (16878416483491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8439208241945 + 8439208241946.

It is an arithmetic number, because the mean of its divisors is an integer number (8439208241946).

Almost surely, 2^{16878416483891} is an apocalyptic number.

16878416483891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16878416483891 is an equidigital number, since it uses as much as digits as its factorization.

16878416483891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 445906944, while the sum is 74.

The spelling of 16878416483891 in words is "sixteen trillion, eight hundred seventy-eight billion, four hundred sixteen million, four hundred eighty-three thousand, eight hundred ninety-one".