201664565546 has 16 divisors (see below), whose sum is σ = 313872730368. Its totient is φ = 97074028800.

The previous prime is 201664565537. The next prime is 201664565587. The reversal of 201664565546 is 645565466102.

It is a junction number, because it is equal to n+sod(n) for n = 201664565494 and 201664565503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8414600 + ... + 8438531.

It is an arithmetic number, because the mean of its divisors is an integer number (19617045648).

Almost surely, 2^201664565546 is an apocalyptic number.

201664565546 is a deficient number, since it is larger than the sum of its proper divisors (112208164822).

201664565546 is a wasteful number, since it uses less digits than its factorization.

201664565546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16853357.

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 201664565546 in words is "two hundred one billion, six hundred sixty-four million, five hundred sixty-five thousand, five hundred forty-six".