16643460585487 has 2 divisors, whose sum is σ = 16643460585488. Its totient is φ = 16643460585486.

The previous prime is 16643460585439. The next prime is 16643460585529. The reversal of 16643460585487 is 78458506434661.

16643460585487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16643460585487 - 2⁷ = 16643460585359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16643460585887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321730292743 + 8321730292744.

It is an arithmetic number, because the mean of its divisors is an integer number (8321730292744).

Almost surely, 2^{16643460585487} is an apocalyptic number.

16643460585487 is a deficient number, since it is larger than the sum of its proper divisors (1).

16643460585487 is an equidigital number, since it uses as much as digits as its factorization.

16643460585487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 464486400, while the sum is 67.

The spelling of 16643460585487 in words is "sixteen trillion, six hundred forty-three billion, four hundred sixty million, five hundred eighty-five thousand, four hundred eighty-seven".