16643460585439 has 2 divisors, whose sum is σ = 16643460585440. Its totient is φ = 16643460585438.

The previous prime is 16643460585379. The next prime is 16643460585487. The reversal of 16643460585439 is 93458506434661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16643460585439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16643460585239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321730292719 + 8321730292720.

It is an arithmetic number, because the mean of its divisors is an integer number (8321730292720).

Almost surely, 2^{16643460585439} is an apocalyptic number.

16643460585439 is a deficient number, since it is larger than the sum of its proper divisors (1).

16643460585439 is an equidigital number, since it uses as much as digits as its factorization.

16643460585439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 223948800, while the sum is 64.

The spelling of 16643460585439 in words is "sixteen trillion, six hundred forty-three billion, four hundred sixty million, five hundred eighty-five thousand, four hundred thirty-nine".