159440644 has 24 divisors (see below), whose sum is σ = 308246400. Its totient is φ = 71554080.

The previous prime is 159440621. The next prime is 159440707. The reversal of 159440644 is 446044951.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19459 + ... + 26410.

It is an arithmetic number, because the mean of its divisors is an integer number (12843600).

Almost surely, 2^159440644 is an apocalyptic number.

It is an amenable number.

159440644 is a deficient number, since it is larger than the sum of its proper divisors (148805756).

159440644 is a wasteful number, since it uses less digits than its factorization.

159440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45963 (or 45961 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 159440644 is about 12626.9807951070. The cubic root of 159440644 is about 542.2501489157.

The spelling of 159440644 in words is "one hundred fifty-nine million, four hundred forty thousand, six hundred forty-four".