159499818 has 24 divisors (see below), whose sum is σ = 346685508. Its totient is φ = 52996992.

The previous prime is 159499807. The next prime is 159499819. The reversal of 159499818 is 818994951.

It can be written as a sum of positive squares in 2 ways, for example, as 158684409 + 815409 = 12597^2 + 903^2 .

It is not an unprimeable number, because it can be changed into a prime (159499819) 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 11 ways as a sum of consecutive naturals, for example, 8271 + ... + 19682.

Almost surely, 2^159499818 is an apocalyptic number.

159499818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

159499818 is an abundant number, since it is smaller than the sum of its proper divisors (187185690).

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

159499818 is a wasteful number, since it uses less digits than its factorization.

159499818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28278 (or 28275 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 159499818 is about 12629.3237348640. The cubic root of 159499818 is about 542.3172232843.

The spelling of 159499818 in words is "one hundred fifty-nine million, four hundred ninety-nine thousand, eight hundred eighteen".