159439351887 has 24 divisors (see below), whose sum is σ = 240103087280. Its totient is φ = 104539768560.

The previous prime is 159439351867. The next prime is 159439351909. The reversal of 159439351887 is 788153934951.

159439351887 is a `hidden beast` number, since 1 + 5 + 9 + 4 + 39 + 3 + 518 + 87 = 666.

It is not a de Polignac number, because 159439351887 - 2⁷ = 159439351759 is a prime.

It is a super-2 number, since 2×159439351887² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159439351867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16199914 + ... + 16209752.

Almost surely, 2^159439351887 is an apocalyptic number.

159439351887 is a deficient number, since it is larger than the sum of its proper divisors (80663735393).

159439351887 is an frugal number, since it uses more digits than its factorization.

159439351887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19748 (or 9903 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 159439351887 in words is "one hundred fifty-nine billion, four hundred thirty-nine million, three hundred fifty-one thousand, eight hundred eighty-seven".