99999888856 has 16 divisors (see below), whose sum is σ = 214285476240. Its totient is φ = 42857095200.

The previous prime is 99999888719. The next prime is 99999888929. The reversal of 99999888856 is 65888899999.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892856095 + ... + 892856206.

It is an arithmetic number, because the mean of its divisors is an integer number (13392842265).

Almost surely, 2^99999888856 is an apocalyptic number.

It is an amenable number.

99999888856 is an abundant number, since it is smaller than the sum of its proper divisors (114285587384).

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

99999888856 is a wasteful number, since it uses less digits than its factorization.

99999888856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785712314 (or 1785712310 counting only the distinct ones).

The product of its digits is 7255941120, while the sum is 88.

The spelling of 99999888856 in words is "ninety-nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, eight hundred fifty-six".