998432040161 has 2 divisors, whose sum is σ = 998432040162. Its totient is φ = 998432040160.

The previous prime is 998432040127. The next prime is 998432040181. The reversal of 998432040161 is 161040234899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901816129600 + 96615910561 = 949640^2 + 310831^2 .

It is a cyclic number.

It is not a de Polignac number, because 998432040161 - 2¹⁸ = 998431778017 is a prime.

It is not a weakly prime, because it can be changed into another prime (998432040181) 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, 499216020080 + 499216020081.

It is an arithmetic number, because the mean of its divisors is an integer number (499216020081).

Almost surely, 2^998432040161 is an apocalyptic number.

It is an amenable number.

998432040161 is a deficient number, since it is larger than the sum of its proper divisors (1).

998432040161 is an equidigital number, since it uses as much as digits as its factorization.

998432040161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 998432040161 in words is "nine hundred ninety-eight billion, four hundred thirty-two million, forty thousand, one hundred sixty-one".