16564607971 has 2 divisors, whose sum is σ = 16564607972. Its totient is φ = 16564607970.

The previous prime is 16564607929. The next prime is 16564608013. The reversal of 16564607971 is 17970646561.

It is a balanced prime because it is at equal distance from previous prime (16564607929) and next prime (16564608013).

It is a cyclic number.

It is not a de Polignac number, because 16564607971 - 2¹¹ = 16564605923 is a prime.

It is not a weakly prime, because it can be changed into another prime (16564607471) 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 as a sum of consecutive naturals, namely, 8282303985 + 8282303986.

It is an arithmetic number, because the mean of its divisors is an integer number (8282303986).

Almost surely, 2^16564607971 is an apocalyptic number.

16564607971 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564607971 is an equidigital number, since it uses as much as digits as its factorization.

16564607971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 16564607971 in words is "sixteen billion, five hundred sixty-four million, six hundred seven thousand, nine hundred seventy-one".