998544626445899 has 8 divisors (see below), whose sum is σ = 1075418065975680. Its totient is φ = 921680088975936.

The previous prime is 998544626445841. The next prime is 998544626445913.

998544626445899 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998544626445899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998544626445809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225281979 + ... + 2225730660.

It is an arithmetic number, because the mean of its divisors is an integer number (134427258246960).

Almost surely, 2^{998544626445899} is an apocalyptic number.

998544626445899 is a deficient number, since it is larger than the sum of its proper divisors (76873439529781).

998544626445899 is a wasteful number, since it uses less digits than its factorization.

998544626445899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451029909.

The product of its digits is 193491763200, while the sum is 92.

The spelling of 998544626445899 in words is "nine hundred ninety-eight trillion, five hundred forty-four billion, six hundred twenty-six million, four hundred forty-five thousand, eight hundred ninety-nine".