159438587218 has 4 divisors (see below), whose sum is σ = 239157880830. Its totient is φ = 79719293608.

The previous prime is 159438587171. The next prime is 159438587219. The reversal of 159438587218 is 812785834951.

159438587218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158836522849 + 602064369 = 398543^2 + 24537^2 .

It is not an unprimeable number, because it can be changed into a prime (159438587219) by changing a digit.

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 as a sum of consecutive naturals, namely, 39859646803 + ... + 39859646806.

Almost surely, 2^159438587218 is an apocalyptic number.

159438587218 is a deficient number, since it is larger than the sum of its proper divisors (79719293612).

159438587218 is an equidigital number, since it uses as much as digits as its factorization.

159438587218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79719293611.

The product of its digits is 19353600, while the sum is 61.

The spelling of 159438587218 in words is "one hundred fifty-nine billion, four hundred thirty-eight million, five hundred eighty-seven thousand, two hundred eighteen".