159259661 has 4 divisors (see below), whose sum is σ = 173737824. Its totient is φ = 144781500.

The previous prime is 159259649. The next prime is 159259663. The reversal of 159259661 is 166952951.

159259661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166952951 = 11 ⋅15177541.

It is a cyclic number.

It is not a de Polignac number, because 159259661 - 2²² = 155065357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159259663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7239065 + ... + 7239086.

It is an arithmetic number, because the mean of its divisors is an integer number (43434456).

Almost surely, 2^159259661 is an apocalyptic number.

159259661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159259661 is a deficient number, since it is larger than the sum of its proper divisors (14478163).

159259661 is a wasteful number, since it uses less digits than its factorization.

159259661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14478162.

The product of its digits is 145800, while the sum is 44.

The square root of 159259661 is about 12619.8122410755. The cubic root of 159259661 is about 542.0448996722.

The spelling of 159259661 in words is "one hundred fifty-nine million, two hundred fifty-nine thousand, six hundred sixty-one".