159434942189 has 4 divisors (see below), whose sum is σ = 159435758460. Its totient is φ = 159434125920.

The previous prime is 159434942143. The next prime is 159434942203. The reversal of 159434942189 is 981249434951.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 127990786564 + 31444155625 = 357758^2 + 177325^2 .

It is a cyclic number.

It is not a de Polignac number, because 159434942189 - 2¹² = 159434938093 is a prime.

It is a super-2 number, since 2×159434942189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159434942089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77327 + ... + 569955.

It is an arithmetic number, because the mean of its divisors is an integer number (39858939615).

Almost surely, 2^159434942189 is an apocalyptic number.

It is an amenable number.

159434942189 is a deficient number, since it is larger than the sum of its proper divisors (816271).

159434942189 is an equidigital number, since it uses as much as digits as its factorization.

159434942189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816270.

The product of its digits is 11197440, while the sum is 59.

The spelling of 159434942189 in words is "one hundred fifty-nine billion, four hundred thirty-four million, nine hundred forty-two thousand, one hundred eighty-nine".