16565501050664 has 64 divisors (see below), whose sum is σ = 31848090019200. Its totient is φ = 8075845345536.

The previous prime is 16565501050649. The next prime is 16565501050667. The reversal of 16565501050664 is 46605010556561.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16565501050667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19625522 + ... + 20452190.

It is an arithmetic number, because the mean of its divisors is an integer number (497626406550).

Almost surely, 2^{16565501050664} is an apocalyptic number.

It is an amenable number.

16565501050664 is a deficient number, since it is larger than the sum of its proper divisors (15282588968536).

16565501050664 is a wasteful number, since it uses less digits than its factorization.

16565501050664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827154 (or 827150 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 16565501050664 in words is "sixteen trillion, five hundred sixty-five billion, five hundred one million, fifty thousand, six hundred sixty-four".