159121405673 has 2 divisors, whose sum is σ = 159121405674. Its totient is φ = 159121405672.

The previous prime is 159121405621. The next prime is 159121405693. The reversal of 159121405673 is 376504121951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152422310569 + 6699095104 = 390413^2 + 81848^2 .

It is an emirp because it is prime and its reverse (376504121951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159121405673 - 2²² = 159117211369 is a prime.

It is not a weakly prime, because it can be changed into another prime (159121405693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79560702836 + 79560702837.

It is an arithmetic number, because the mean of its divisors is an integer number (79560702837).

Almost surely, 2^159121405673 is an apocalyptic number.

It is an amenable number.

159121405673 is a deficient number, since it is larger than the sum of its proper divisors (1).

159121405673 is an equidigital number, since it uses as much as digits as its factorization.

159121405673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 159121405673 in words is "one hundred fifty-nine billion, one hundred twenty-one million, four hundred five thousand, six hundred seventy-three".