9998612856 has 48 divisors (see below), whose sum is σ = 27105842400. Its totient is φ = 3329638272.

The previous prime is 9998612803. The next prime is 9998612857. The reversal of 9998612856 is 6582168999.

9998612856 is a `hidden beast` number, since 9 + 9 + 9 + 8 + 612 + 8 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9998612793 and 9998612802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998612857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7980 + ... + 141636.

It is an arithmetic number, because the mean of its divisors is an integer number (564705050).

Almost surely, 2^9998612856 is an apocalyptic number.

It is an amenable number.

9998612856 is an abundant number, since it is smaller than the sum of its proper divisors (17107229544).

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

9998612856 is a wasteful number, since it uses less digits than its factorization.

9998612856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134708 (or 134701 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 9998612856 is about 99993.0640394623. The cubic root of 9998612856 is about 2154.3350683870.

The spelling of 9998612856 in words is "nine billion, nine hundred ninety-eight million, six hundred twelve thousand, eight hundred fifty-six".