998742395633 has 2 divisors, whose sum is σ = 998742395634. Its totient is φ = 998742395632.

The previous prime is 998742395627. The next prime is 998742395653. The reversal of 998742395633 is 336593247899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963964621489 + 34777774144 = 981817^2 + 186488^2 .

It is a cyclic number.

It is not a de Polignac number, because 998742395633 - 2⁶ = 998742395569 is a prime.

It is not a weakly prime, because it can be changed into another prime (998742395653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499371197816 + 499371197817.

It is an arithmetic number, because the mean of its divisors is an integer number (499371197817).

Almost surely, 2^998742395633 is an apocalyptic number.

It is an amenable number.

998742395633 is a deficient number, since it is larger than the sum of its proper divisors (1).

998742395633 is an equidigital number, since it uses as much as digits as its factorization.

998742395633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264539520, while the sum is 68.

The spelling of 998742395633 in words is "nine hundred ninety-eight billion, seven hundred forty-two million, three hundred ninety-five thousand, six hundred thirty-three".