159436121857 has 2 divisors, whose sum is σ = 159436121858. Its totient is φ = 159436121856.

The previous prime is 159436121849. The next prime is 159436121879. The reversal of 159436121857 is 758121634951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130641765136 + 28794356721 = 361444^2 + 169689^2 .

It is an emirp because it is prime and its reverse (758121634951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159436121857 - 2³ = 159436121849 is a prime.

It is not a weakly prime, because it can be changed into another prime (159436121807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79718060928 + 79718060929.

It is an arithmetic number, because the mean of its divisors is an integer number (79718060929).

Almost surely, 2^159436121857 is an apocalyptic number.

It is an amenable number.

159436121857 is a deficient number, since it is larger than the sum of its proper divisors (1).

159436121857 is an equidigital number, since it uses as much as digits as its factorization.

159436121857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The spelling of 159436121857 in words is "one hundred fifty-nine billion, four hundred thirty-six million, one hundred twenty-one thousand, eight hundred fifty-seven".