159204661 has 12 divisors (see below), whose sum is σ = 199993696. Its totient is φ = 124054920.

The previous prime is 159204659. The next prime is 159204679. The reversal of 159204661 is 166402951.

It is not a de Polignac number, because 159204661 - 2¹ = 159204659 is a prime.

It is a super-2 number, since 2×159204661² = 50692248168249842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159204601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93135 + ... + 94828.

Almost surely, 2^159204661 is an apocalyptic number.

159204661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159204661 is a deficient number, since it is larger than the sum of its proper divisors (40789035).

159204661 is a wasteful number, since it uses less digits than its factorization.

159204661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187992 (or 187981 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 159204661 is about 12617.6329396603. The cubic root of 159204661 is about 541.9824944533.

The spelling of 159204661 in words is "one hundred fifty-nine million, two hundred four thousand, six hundred sixty-one".