159393427765321 has 2 divisors, whose sum is σ = 159393427765322. Its totient is φ = 159393427765320.

The previous prime is 159393427765301. The next prime is 159393427765387. The reversal of 159393427765321 is 123567724393951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116682771920400 + 42710655844921 = 10801980^2 + 6535339^2 .

It is an emirp because it is prime and its reverse (123567724393951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159393427765321 is a prime.

It is not a weakly prime, because it can be changed into another prime (159393427765301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79696713882660 + 79696713882661.

It is an arithmetic number, because the mean of its divisors is an integer number (79696713882661).

Almost surely, 2^{159393427765321} is an apocalyptic number.

It is an amenable number.

159393427765321 is a deficient number, since it is larger than the sum of its proper divisors (1).

159393427765321 is an equidigital number, since it uses as much as digits as its factorization.

159393427765321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 257191200, while the sum is 67.

The spelling of 159393427765321 in words is "one hundred fifty-nine trillion, three hundred ninety-three billion, four hundred twenty-seven million, seven hundred sixty-five thousand, three hundred twenty-one".