16542603009 has 6 divisors (see below), whose sum is σ = 23894871026. Its totient is φ = 11028402000.

The previous prime is 16542602977. The next prime is 16542603029. The reversal of 16542603009 is 90030624561.

It is a happy number.

16542603009 is a `hidden beast` number, since 1 + 6 + 5 + 42 + 603 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16314441984 + 228161025 = 127728^2 + 15105^2 .

It is not a de Polignac number, because 16542603009 - 2⁵ = 16542602977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16542603029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 919033492 + ... + 919033509.

Almost surely, 2^16542603009 is an apocalyptic number.

It is an amenable number.

16542603009 is a deficient number, since it is larger than the sum of its proper divisors (7352268017).

16542603009 is a wasteful number, since it uses less digits than its factorization.

16542603009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838067007 (or 1838067004 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 16542603009 in words is "sixteen billion, five hundred forty-two million, six hundred three thousand, nine".