159538561 has 32 divisors (see below), whose sum is σ = 205990400. Its totient is φ = 122689728.

The previous prime is 159538559. The next prime is 159538601. The reversal of 159538561 is 165835951.

It is not a de Polignac number, because 159538561 - 2¹ = 159538559 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (159538531) 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 31 ways as a sum of consecutive naturals, for example, 164500 + ... + 165466.

It is an arithmetic number, because the mean of its divisors is an integer number (6437200).

Almost surely, 2^159538561 is an apocalyptic number.

It is an amenable number.

159538561 is a deficient number, since it is larger than the sum of its proper divisors (46451839).

159538561 is an equidigital number, since it uses as much as digits as its factorization.

159538561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1024 counting only the distinct ones).

The product of its digits is 162000, while the sum is 43.

The square root of 159538561 is about 12630.8574926645. The cubic root of 159538561 is about 542.3611299075.

The spelling of 159538561 in words is "one hundred fifty-nine million, five hundred thirty-eight thousand, five hundred sixty-one".