159440873721 has 8 divisors (see below), whose sum is σ = 219445503744. Its totient is φ = 102865079760.

The previous prime is 159440873701. The next prime is 159440873743. The reversal of 159440873721 is 127378044951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159440873721 - 2¹¹ = 159440871673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159440873701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857208906 + ... + 857209091.

It is an arithmetic number, because the mean of its divisors is an integer number (27430687968).

Almost surely, 2^159440873721 is an apocalyptic number.

It is an amenable number.

159440873721 is a deficient number, since it is larger than the sum of its proper divisors (60004630023).

159440873721 is a wasteful number, since it uses less digits than its factorization.

159440873721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714418031.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 159440873721 in words is "one hundred fifty-nine billion, four hundred forty million, eight hundred seventy-three thousand, seven hundred twenty-one".