6542966209 has 16 divisors (see below), whose sum is σ = 7209715968. Its totient is φ = 5900049792.

The previous prime is 6542966207. The next prime is 6542966233. The reversal of 6542966209 is 9026692456.

It is a happy number.

It is not a de Polignac number, because 6542966209 - 2¹ = 6542966207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6542966207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324429 + ... + 344005.

It is an arithmetic number, because the mean of its divisors is an integer number (450607248).

Almost surely, 2^6542966209 is an apocalyptic number.

It is an amenable number.

6542966209 is a deficient number, since it is larger than the sum of its proper divisors (666749759).

6542966209 is a wasteful number, since it uses less digits than its factorization.

6542966209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20184.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 6542966209 is about 80888.6037028703. The cubic root of 6542966209 is about 1870.3586497890.

The spelling of 6542966209 in words is "six billion, five hundred forty-two million, nine hundred sixty-six thousand, two hundred nine".