9998878533012 has 72 divisors (see below), whose sum is σ = 26211707121600. Its totient is φ = 3332876201856.

The previous prime is 9998878532971. The next prime is 9998878533013. The reversal of 9998878533012 is 2103358788999.

9998878533012 is a `hidden beast` number, since 9 + 9 + 9 + 8 + 8 + 78 + 533 + 0 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998878533013) 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, 48067564 + ... + 48275132.

It is an arithmetic number, because the mean of its divisors is an integer number (364051487800).

Almost surely, 2^{9998878533012} is an apocalyptic number.

It is an amenable number.

9998878533012 is an abundant number, since it is smaller than the sum of its proper divisors (16212828588588).

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

9998878533012 is a wasteful number, since it uses less digits than its factorization.

9998878533012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257147 (or 257133 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 72.

The spelling of 9998878533012 in words is "nine trillion, nine hundred ninety-eight billion, eight hundred seventy-eight million, five hundred thirty-three thousand, twelve".