159640551656 has 16 divisors (see below), whose sum is σ = 303426392100. Its totient is φ = 78726847104.

The previous prime is 159640551647. The next prime is 159640551709. The reversal of 159640551656 is 656155046951.

It can be written as a sum of positive squares in 2 ways, for example, as 155893887556 + 3746664100 = 394834^2 + 61210^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 159640551598 and 159640551607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136677971 + ... + 136679138.

Almost surely, 2^159640551656 is an apocalyptic number.

It is an amenable number.

159640551656 is a deficient number, since it is larger than the sum of its proper divisors (143785840444).

159640551656 is a wasteful number, since it uses less digits than its factorization.

159640551656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273357188 (or 273357184 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 159640551656 in words is "one hundred fifty-nine billion, six hundred forty million, five hundred fifty-one thousand, six hundred fifty-six".