159444681 has 8 divisors (see below), whose sum is σ = 231919584. Its totient is φ = 96633120.

The previous prime is 159444679. The next prime is 159444689. The reversal of 159444681 is 186444951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159444681 - 2¹ = 159444679 is a prime.

It is a super-2 number, since 2×159444681² = 50845212598383522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (159444689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415796 + ... + 2415861.

It is an arithmetic number, because the mean of its divisors is an integer number (28989948).

Almost surely, 2^159444681 is an apocalyptic number.

159444681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159444681 is a deficient number, since it is larger than the sum of its proper divisors (72474903).

159444681 is a wasteful number, since it uses less digits than its factorization.

159444681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831671.

The product of its digits is 138240, while the sum is 42.

The square root of 159444681 is about 12627.1406502026. The cubic root of 159444681 is about 542.2547254263.

The spelling of 159444681 in words is "one hundred fifty-nine million, four hundred forty-four thousand, six hundred eighty-one".