998529564673 has 2 divisors, whose sum is σ = 998529564674. Its totient is φ = 998529564672.

The previous prime is 998529564671. The next prime is 998529564701. The reversal of 998529564673 is 376465925899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805125754944 + 193403809729 = 897288^2 + 439777^2 .

It is a cyclic number.

It is not a de Polignac number, because 998529564673 - 2¹ = 998529564671 is a prime.

It is a super-2 number, since 2×998529564673² (a number of 25 digits) contains 22 as substring.

Together with 998529564671, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 998529564596 and 998529564605.

It is not a weakly prime, because it can be changed into another prime (998529564671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499264782336 + 499264782337.

It is an arithmetic number, because the mean of its divisors is an integer number (499264782337).

It is a Proth number, since it is equal to 59517 ⋅ 2²⁴ + 1 and 59517 < 2²⁴.

Almost surely, 2^998529564673 is an apocalyptic number.

It is an amenable number.

998529564673 is a deficient number, since it is larger than the sum of its proper divisors (1).

998529564673 is an equidigital number, since it uses as much as digits as its factorization.

998529564673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 881798400, while the sum is 73.

The spelling of 998529564673 in words is "nine hundred ninety-eight billion, five hundred twenty-nine million, five hundred sixty-four thousand, six hundred seventy-three".