159899688 has 144 divisors (see below), whose sum is σ = 497163420. Its totient is φ = 46245888.

The previous prime is 159899669. The next prime is 159899689. The reversal of 159899688 is 886998951.

It can be written as a sum of positive squares in 6 ways, for example, as 11985444 + 147914244 = 3462^2 + 12162^2 .

It is not an unprimeable number, because it can be changed into a prime (159899689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 206470 + ... + 207242.

Almost surely, 2^159899688 is an apocalyptic number.

159899688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159899688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248581710).

159899688 is an abundant number, since it is smaller than the sum of its proper divisors (337263732).

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

159899688 is a wasteful number, since it uses less digits than its factorization.

159899688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 808 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The square root of 159899688 is about 12645.1448390281. The cubic root of 159899688 is about 542.7700459925.

The spelling of 159899688 in words is "one hundred fifty-nine million, eight hundred ninety-nine thousand, six hundred eighty-eight".