159731774971 has 4 divisors (see below), whose sum is σ = 169127761752. Its totient is φ = 150335788192.

The previous prime is 159731774959. The next prime is 159731775001. The reversal of 159731774971 is 179477137951.

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

It is a cyclic number.

It is not a de Polignac number, because 159731774971 - 2⁹ = 159731774459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159731774911) 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, 4697993365 + ... + 4697993398.

It is an arithmetic number, because the mean of its divisors is an integer number (42281940438).

Almost surely, 2^159731774971 is an apocalyptic number.

159731774971 is a deficient number, since it is larger than the sum of its proper divisors (9395986781).

159731774971 is an equidigital number, since it uses as much as digits as its factorization.

159731774971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9395986780.

The product of its digits is 11668860, while the sum is 61.

The spelling of 159731774971 in words is "one hundred fifty-nine billion, seven hundred thirty-one million, seven hundred seventy-four thousand, nine hundred seventy-one".