16637764671841 has 2 divisors, whose sum is σ = 16637764671842. Its totient is φ = 16637764671840.

The previous prime is 16637764671763. The next prime is 16637764671851. The reversal of 16637764671841 is 14817646773661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9117555381841 + 7520209290000 = 3019529^2 + 2742300^2 .

It is an emirp because it is prime and its reverse (14817646773661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16637764671841 - 2¹⁹ = 16637764147553 is a prime.

It is not a weakly prime, because it can be changed into another prime (16637764671851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8318882335920 + 8318882335921.

It is an arithmetic number, because the mean of its divisors is an integer number (8318882335921).

Almost surely, 2^{16637764671841} is an apocalyptic number.

It is an amenable number.

16637764671841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16637764671841 is an equidigital number, since it uses as much as digits as its factorization.

16637764671841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170698752, while the sum is 67.

The spelling of 16637764671841 in words is "sixteen trillion, six hundred thirty-seven billion, seven hundred sixty-four million, six hundred seventy-one thousand, eight hundred forty-one".