999998855112 has 32 divisors (see below), whose sum is σ = 2500035422400. Its totient is φ = 333327847104.

The previous prime is 999998855111. The next prime is 999998855159. The reversal of 999998855112 is 211558899999.

999998855112 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (999998855111) 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, 1490214 + ... + 2054442.

It is an arithmetic number, because the mean of its divisors is an integer number (78126106950).

Almost surely, 2^999998855112 is an apocalyptic number.

It is an amenable number.

999998855112 is an abundant number, since it is smaller than the sum of its proper divisors (1500036567288).

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

999998855112 is a wasteful number, since it uses less digits than its factorization.

999998855112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638085 (or 638081 counting only the distinct ones).

The product of its digits is 188956800, while the sum is 75.

The spelling of 999998855112 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred fifty-five thousand, one hundred twelve".