159291560521 has 2 divisors, whose sum is σ = 159291560522. Its totient is φ = 159291560520.

The previous prime is 159291560513. The next prime is 159291560531. The reversal of 159291560521 is 125065192951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156231258121 + 3060302400 = 395261^2 + 55320^2 .

It is a cyclic number.

It is not a de Polignac number, because 159291560521 - 2³ = 159291560513 is a prime.

It is not a weakly prime, because it can be changed into another prime (159291560501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79645780260 + 79645780261.

It is an arithmetic number, because the mean of its divisors is an integer number (79645780261).

Almost surely, 2^159291560521 is an apocalyptic number.

It is an amenable number.

159291560521 is a deficient number, since it is larger than the sum of its proper divisors (1).

159291560521 is an equidigital number, since it uses as much as digits as its factorization.

159291560521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 159291560521 in words is "one hundred fifty-nine billion, two hundred ninety-one million, five hundred sixty thousand, five hundred twenty-one".