99988770168 has 256 divisors, whose sum is σ = 322834406400. Its totient is φ = 28083179520.

The previous prime is 99988770143. The next prime is 99988770179. The reversal of 99988770168 is 86107788999.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 99988770096 and 99988770105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77091696 + ... + 77092992.

It is an arithmetic number, because the mean of its divisors is an integer number (1261071900).

Almost surely, 2^99988770168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99988770168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161417203200).

99988770168 is an abundant number, since it is smaller than the sum of its proper divisors (222845636232).

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

99988770168 is a wasteful number, since it uses less digits than its factorization.

99988770168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 72.

The spelling of 99988770168 in words is "ninety-nine billion, nine hundred eighty-eight million, seven hundred seventy thousand, one hundred sixty-eight".