159881616 has 30 divisors (see below), whose sum is σ = 447446870. Its totient is φ = 53293824.

The previous prime is 159881593. The next prime is 159881621. The reversal of 159881616 is 616188951.

It can be written as a sum of positive squares in only one way, i.e., 90326016 + 69555600 = 9504^2 + 8340^2 .

It is a super-2 number, since 2×159881616² = 51124262269542912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555001 + ... + 555288.

Almost surely, 2^159881616 is an apocalyptic number.

159881616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

159881616 is an abundant number, since it is smaller than the sum of its proper divisors (287565254).

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

159881616 is a wasteful number, since it uses less digits than its factorization.

159881616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110303 (or 1110294 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 159881616 is about 12644.4302362740. The cubic root of 159881616 is about 542.7495971099.

The spelling of 159881616 in words is "one hundred fifty-nine million, eight hundred eighty-one thousand, six hundred sixteen".