159555565 has 16 divisors (see below), whose sum is σ = 209580336. Its totient is φ = 115891200.

The previous prime is 159555563. The next prime is 159555569. The reversal of 159555565 is 565555951.

It can be written as a sum of positive squares in 8 ways, for example, as 85784644 + 73770921 = 9262^2 + 8589^2 .

It is not a de Polignac number, because 159555565 - 2¹ = 159555563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159555563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16156 + ... + 24085.

It is an arithmetic number, because the mean of its divisors is an integer number (13098771).

Almost surely, 2^159555565 is an apocalyptic number.

It is an amenable number.

159555565 is a deficient number, since it is larger than the sum of its proper divisors (50024771).

159555565 is a wasteful number, since it uses less digits than its factorization.

159555565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40320.

The product of its digits is 843750, while the sum is 46.

The square root of 159555565 is about 12631.5305881750. The cubic root of 159555565 is about 542.3803979368.

The spelling of 159555565 in words is "one hundred fifty-nine million, five hundred fifty-five thousand, five hundred sixty-five".