159348771521 has 4 divisors (see below), whose sum is σ = 159530469972. Its totient is φ = 159167073072.

The previous prime is 159348771487. The next prime is 159348771541. The reversal of 159348771521 is 125177843951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125177843951 = 929 ⋅134744719.

It can be written as a sum of positive squares in 2 ways, for example, as 66406713025 + 92942058496 = 257695^2 + 304864^2 .

It is a cyclic number.

It is not a de Polignac number, because 159348771521 - 2⁶ = 159348771457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159348771541) 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, 90847910 + ... + 90849663.

It is an arithmetic number, because the mean of its divisors is an integer number (39882617493).

Almost surely, 2^159348771521 is an apocalyptic number.

It is an amenable number.

159348771521 is a deficient number, since it is larger than the sum of its proper divisors (181698451).

159348771521 is an equidigital number, since it uses as much as digits as its factorization.

159348771521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181698450.

The product of its digits is 2116800, while the sum is 53.

The spelling of 159348771521 in words is "one hundred fifty-nine billion, three hundred forty-eight million, seven hundred seventy-one thousand, five hundred twenty-one".