16543550564 has 12 divisors (see below), whose sum is σ = 29024141244. Its totient is φ = 8250938784.

The previous prime is 16543550563. The next prime is 16543550587. The reversal of 16543550564 is 46505534561.

It can be written as a sum of positive squares in 2 ways, for example, as 12544000000 + 3999550564 = 112000^2 + 63242^2 .

It is not an unprimeable number, because it can be changed into a prime (16543550563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207339 + ... + 5210514.

It is an arithmetic number, because the mean of its divisors is an integer number (2418678437).

Almost surely, 2^16543550564 is an apocalyptic number.

It is an amenable number.

16543550564 is a deficient number, since it is larger than the sum of its proper divisors (12480590680).

16543550564 is a wasteful number, since it uses less digits than its factorization.

16543550564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10418254 (or 10418252 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 16543550564 in words is "sixteen billion, five hundred forty-three million, five hundred fifty thousand, five hundred sixty-four".