159597665 has 16 divisors (see below), whose sum is σ = 196128000. Its totient is φ = 124619520.

The previous prime is 159597619. The next prime is 159597677. The reversal of 159597665 is 566795951.

It is not a de Polignac number, because 159597665 - 2⁶ = 159597601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116585 + ... + 117945.

It is an arithmetic number, because the mean of its divisors is an integer number (12258000).

Almost surely, 2^159597665 is an apocalyptic number.

It is an amenable number.

159597665 is a deficient number, since it is larger than the sum of its proper divisors (36530335).

159597665 is a wasteful number, since it uses less digits than its factorization.

159597665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its digits is 2551500, while the sum is 53.

The square root of 159597665 is about 12633.1969429753. The cubic root of 159597665 is about 542.4280975302.

The spelling of 159597665 in words is "one hundred fifty-nine million, five hundred ninety-seven thousand, six hundred sixty-five".