998499505896 has 24 divisors (see below), whose sum is σ = 2704269495330. Its totient is φ = 332833168608.

The previous prime is 998499505891. The next prime is 998499505903. The reversal of 998499505896 is 698505994899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 763648776900 + 234850728996 = 873870^2 + 484614^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×998499505896² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (998499505891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6934024275 + ... + 6934024418.

Almost surely, 2^998499505896 is an apocalyptic number.

It is an amenable number.

998499505896 is an abundant number, since it is smaller than the sum of its proper divisors (1705769989434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998499505896 is a wasteful number, since it uses less digits than its factorization.

998499505896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13868048705 (or 13868048698 counting only the distinct ones).

The product of its (nonzero) digits is 2267481600, while the sum is 81.

The spelling of 998499505896 in words is "nine hundred ninety-eight billion, four hundred ninety-nine million, five hundred five thousand, eight hundred ninety-six".