159433302681 has 9 divisors (see below), whose sum is σ = 230294278591. Its totient is φ = 106288069872.

The previous prime is 159433302667. The next prime is 159433302709. The reversal of 159433302681 is 186203334951.

The square root of 159433302681 is 399291.

It is a perfect power (a square), and thus also a powerful number.

159433302681 is a `hidden beast` number, since 1 + 59 + 4 + 3 + 330 + 268 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7164776025 + 152268526656 = 84645^2 + 390216^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 159433302681 - 2⁵ = 159433302649 is a prime.

It is a super-2 number, since 2×159433302681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159433302601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1131325 + ... + 1264421.

Almost surely, 2^159433302681 is an apocalyptic number.

159433302681 is the 399291-st square number.

159433302681 is the 199646-th centered octagonal number.

It is an amenable number.

159433302681 is a deficient number, since it is larger than the sum of its proper divisors (70860975910).

159433302681 is an frugal number, since it uses more digits than its factorization.

159433302681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266200 (or 133100 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 159433302681 in words is "one hundred fifty-nine billion, four hundred thirty-three million, three hundred two thousand, six hundred eighty-one".