159971209061 has 4 divisors (see below), whose sum is σ = 168390746400. Its totient is φ = 151551671724.

The previous prime is 159971209049. The next prime is 159971209127. The reversal of 159971209061 is 160902179951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 159971209061 - 2¹⁴ = 159971192677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159971269061) 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, 4209768641 + ... + 4209768678.

It is an arithmetic number, because the mean of its divisors is an integer number (42097686600).

Almost surely, 2^159971209061 is an apocalyptic number.

It is an amenable number.

159971209061 is a deficient number, since it is larger than the sum of its proper divisors (8419537339).

159971209061 is an equidigital number, since it uses as much as digits as its factorization.

159971209061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8419537338.

The product of its (nonzero) digits is 306180, while the sum is 50.

The spelling of 159971209061 in words is "one hundred fifty-nine billion, nine hundred seventy-one million, two hundred nine thousand, sixty-one".