998164842723 has 16 divisors (see below), whose sum is σ = 1478804173440. Its totient is φ = 665424578952.

The previous prime is 998164842721. The next prime is 998164842743. The reversal of 998164842723 is 327248461899.

998164842723 is a `hidden beast` number, since 9 + 9 + 81 + 6 + 484 + 2 + 72 + 3 = 666.

It is a Cunningham number, because it is equal to 999082²-1.

It is not a de Polignac number, because 998164842723 - 2¹ = 998164842721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998164842721) 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 in 15 ways as a sum of consecutive naturals, for example, 499540 + ... + 1498622.

It is an arithmetic number, because the mean of its divisors is an integer number (92425260840).

Almost surely, 2^998164842723 is an apocalyptic number.

998164842723 is a deficient number, since it is larger than the sum of its proper divisors (480639330717).

998164842723 is a wasteful number, since it uses less digits than its factorization.

998164842723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036095 (or 1036089 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 998164842723 in words is "nine hundred ninety-eight billion, one hundred sixty-four million, eight hundred forty-two thousand, seven hundred twenty-three".