159731732161 has 4 divisors (see below), whose sum is σ = 159791048532. Its totient is φ = 159672415792.

The previous prime is 159731732143. The next prime is 159731732177. The reversal of 159731732161 is 161237137951.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118366273936 + 41365458225 = 344044^2 + 203385^2 .

It is a cyclic number.

It is not a de Polignac number, because 159731732161 - 2¹⁹ = 159731207873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159731702161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29654146 + ... + 29659531.

It is an arithmetic number, because the mean of its divisors is an integer number (39947762133).

Almost surely, 2^159731732161 is an apocalyptic number.

It is an amenable number.

159731732161 is a deficient number, since it is larger than the sum of its proper divisors (59316371).

159731732161 is an equidigital number, since it uses as much as digits as its factorization.

159731732161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59316370.

The product of its digits is 238140, while the sum is 46.

The spelling of 159731732161 in words is "one hundred fifty-nine billion, seven hundred thirty-one million, seven hundred thirty-two thousand, one hundred sixty-one".