159436121893 has 2 divisors, whose sum is σ = 159436121894. Its totient is φ = 159436121892.

The previous prime is 159436121879. The next prime is 159436121899. The reversal of 159436121893 is 398121634951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98193236164 + 61242885729 = 313358^2 + 247473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159436121893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159436121893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159436121899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79718060946 + 79718060947.

It is an arithmetic number, because the mean of its divisors is an integer number (79718060947).

Almost surely, 2^159436121893 is an apocalyptic number.

It is an amenable number.

159436121893 is a deficient number, since it is larger than the sum of its proper divisors (1).

159436121893 is an equidigital number, since it uses as much as digits as its factorization.

159436121893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 52.

The spelling of 159436121893 in words is "one hundred fifty-nine billion, four hundred thirty-six million, one hundred twenty-one thousand, eight hundred ninety-three".