16564703616241 has 4 divisors (see below), whose sum is σ = 18070585763184. Its totient is φ = 15058821469300.

The previous prime is 16564703616073. The next prime is 16564703616289. The reversal of 16564703616241 is 14261630746561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16564703616241 - 2¹⁹ = 16564703091953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16564703619241) 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, 752941073455 + ... + 752941073476.

It is an arithmetic number, because the mean of its divisors is an integer number (4517646440796).

Almost surely, 2^{16564703616241} is an apocalyptic number.

16564703616241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16564703616241 is a deficient number, since it is larger than the sum of its proper divisors (1505882146943).

16564703616241 is a wasteful number, since it uses less digits than its factorization.

16564703616241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505882146942.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 16564703616241 in words is "sixteen trillion, five hundred sixty-four billion, seven hundred three million, six hundred sixteen thousand, two hundred forty-one".