998559999999 has 24 divisors (see below), whose sum is σ = 1463981958192. Its totient is φ = 655730570880.

The previous prime is 998559999977. The next prime is 998560000013. The reversal of 998559999999 is 999999955899.

It is not a de Polignac number, because 998559999999 - 2³⁹ = 448804186111 is a prime.

998559999999 is a modest number, since divided by 999999 gives 998559 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998559992999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12285417 + ... + 12366429.

It is an arithmetic number, because the mean of its divisors is an integer number (60999248258).

Almost surely, 2^998559999999 is an apocalyptic number.

998559999999 is a deficient number, since it is larger than the sum of its proper divisors (465421958193).

998559999999 is a wasteful number, since it uses less digits than its factorization.

998559999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101527 (or 101524 counting only the distinct ones).

The product of its digits is 77484097800, while the sum is 99.

The spelling of 998559999999 in words is "nine hundred ninety-eight billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".