16564635247087 has 2 divisors, whose sum is σ = 16564635247088. Its totient is φ = 16564635247086.

The previous prime is 16564635247057. The next prime is 16564635247133. The reversal of 16564635247087 is 78074253646561.

It is a weak prime.

It is an emirp because it is prime and its reverse (78074253646561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16564635247087 - 2⁷ = 16564635246959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16564635247057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282317623543 + 8282317623544.

It is an arithmetic number, because the mean of its divisors is an integer number (8282317623544).

Almost surely, 2^{16564635247087} is an apocalyptic number.

16564635247087 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564635247087 is an equidigital number, since it uses as much as digits as its factorization.

16564635247087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 203212800, while the sum is 64.

The spelling of 16564635247087 in words is "sixteen trillion, five hundred sixty-four billion, six hundred thirty-five million, two hundred forty-seven thousand, eighty-seven".