16543550563 has 2 divisors, whose sum is σ = 16543550564. Its totient is φ = 16543550562.

The previous prime is 16543550549. The next prime is 16543550587. The reversal of 16543550563 is 36505534561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16543550563 - 2⁵ = 16543550531 is a prime.

It is not a weakly prime, because it can be changed into another prime (16543500563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8271775281 + 8271775282.

It is an arithmetic number, because the mean of its divisors is an integer number (8271775282).

Almost surely, 2^16543550563 is an apocalyptic number.

16543550563 is a deficient number, since it is larger than the sum of its proper divisors (1).

16543550563 is an equidigital number, since it uses as much as digits as its factorization.

16543550563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810000, while the sum is 43.

The spelling of 16543550563 in words is "sixteen billion, five hundred forty-three million, five hundred fifty thousand, five hundred sixty-three".