159918638 has 16 divisors (see below), whose sum is σ = 262217520. Its totient is φ = 72542400.

The previous prime is 159918623. The next prime is 159918641. The reversal of 159918638 is 836819951.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4058 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (16388595).

Almost surely, 2^159918638 is an apocalyptic number.

159918638 is a deficient number, since it is larger than the sum of its proper divisors (102298882).

159918638 is a wasteful number, since it uses less digits than its factorization.

159918638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14803.

The product of its digits is 466560, while the sum is 50.

The square root of 159918638 is about 12645.8941162735. The cubic root of 159918638 is about 542.7914866974.

The spelling of 159918638 in words is "one hundred fifty-nine million, nine hundred eighteen thousand, six hundred thirty-eight".