159665265 has 24 divisors (see below), whose sum is σ = 291320640. Its totient is φ = 80672544.

The previous prime is 159665263. The next prime is 159665273. The reversal of 159665265 is 562566951.

159665265 is a `hidden beast` number, since 1 + 596 + 6 + 52 + 6 + 5 = 666.

It is not a de Polignac number, because 159665265 - 2¹ = 159665263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 159665265.

It is not an unprimeable number, because it can be changed into a prime (159665263) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 92517 + ... + 94226.

It is an arithmetic number, because the mean of its divisors is an integer number (12138360).

Almost surely, 2^159665265 is an apocalyptic number.

159665265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

159665265 is a deficient number, since it is larger than the sum of its proper divisors (131655375).

159665265 is a wasteful number, since it uses less digits than its factorization.

159665265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186773 (or 186770 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 159665265 is about 12635.8721503504. The cubic root of 159665265 is about 542.5046712560.

The spelling of 159665265 in words is "one hundred fifty-nine million, six hundred sixty-five thousand, two hundred sixty-five".