16564047675663 has 4 divisors (see below), whose sum is σ = 22085396900888. Its totient is φ = 11042698450440.

The previous prime is 16564047675647. The next prime is 16564047675673. The reversal of 16564047675663 is 36657674046561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16564047675663 - 2⁴ = 16564047675647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16564047675594 and 16564047675603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564047675673) 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, 2760674612608 + ... + 2760674612613.

It is an arithmetic number, because the mean of its divisors is an integer number (5521349225222).

Almost surely, 2^{16564047675663} is an apocalyptic number.

16564047675663 is a deficient number, since it is larger than the sum of its proper divisors (5521349225225).

16564047675663 is an equidigital number, since it uses as much as digits as its factorization.

16564047675663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521349225224.

The product of its (nonzero) digits is 457228800, while the sum is 66.

The spelling of 16564047675663 in words is "sixteen trillion, five hundred sixty-four billion, forty-seven million, six hundred seventy-five thousand, six hundred sixty-three".