159681942 has 40 divisors (see below), whose sum is σ = 408923856. Its totient is φ = 45623088.

The previous prime is 159681937. The next prime is 159681967. The reversal of 159681942 is 249186951.

159681942 is a `hidden beast` number, since 1 + 596 + 8 + 19 + 42 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69273 + ... + 71540.

Almost surely, 2^159681942 is an apocalyptic number.

159681942 is an abundant number, since it is smaller than the sum of its proper divisors (249241914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159681942 is a wasteful number, since it uses less digits than its factorization.

159681942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140834 (or 140825 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 159681942 is about 12636.5320400813. The cubic root of 159681942 is about 542.5235587609.

It can be divided in two parts, 1596 and 81942, that added together give a palindrome (83538).

The spelling of 159681942 in words is "one hundred fifty-nine million, six hundred eighty-one thousand, nine hundred forty-two".