159647394481 has 9 divisors (see below), whose sum is σ = 164976236523. Its totient is φ = 154485491760.

The previous prime is 159647394469. The next prime is 159647394499. The reversal of 159647394481 is 184493746951.

The square root of 159647394481 is 399559.

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

It can be written as a sum of positive squares in only one way, i.e., 104722784881 + 54924609600 = 323609^2 + 234360^2 .

It is not a de Polignac number, because 159647394481 - 2⁷ = 159647394353 is a prime.

It is a super-2 number, since 2×159647394481² (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 (159647391481) 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, 12379885 + ... + 12392773.

It is an arithmetic number, because the mean of its divisors is an integer number (18330692947).

Almost surely, 2^159647394481 is an apocalyptic number.

159647394481 is the 399559-th square number.

159647394481 is the 199780-th centered octagonal number.

It is an amenable number.

159647394481 is a deficient number, since it is larger than the sum of its proper divisors (5328842042).

159647394481 is an frugal number, since it uses more digits than its factorization.

159647394481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840 (or 12920 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The spelling of 159647394481 in words is "one hundred fifty-nine billion, six hundred forty-seven million, three hundred ninety-four thousand, four hundred eighty-one".