997744555447799 has 2 divisors, whose sum is σ = 997744555447800. Its totient is φ = 997744555447798.

The previous prime is 997744555447769. The next prime is 997744555447807.

997744555447799 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 997744555447799 - 2⁸ = 997744555447543 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997744555447769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498872277723899 + 498872277723900.

It is an arithmetic number, because the mean of its divisors is an integer number (498872277723900).

Almost surely, 2^{997744555447799} is an apocalyptic number.

997744555447799 is a deficient number, since it is larger than the sum of its proper divisors (1).

997744555447799 is an equidigital number, since it uses as much as digits as its factorization.

997744555447799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504094752000, while the sum is 95.

The spelling of 997744555447799 in words is "nine hundred ninety-seven trillion, seven hundred forty-four billion, five hundred fifty-five million, four hundred forty-seven thousand, seven hundred ninety-nine".