159564643 has 4 divisors (see below), whose sum is σ = 182359600. Its totient is φ = 136769688.

The previous prime is 159564637. The next prime is 159564649. The reversal of 159564643 is 346465951.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (159564637) and next prime (159564649).

It is a cyclic number.

It is not a de Polignac number, because 159564643 - 2⁵ = 159564611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159564643.

It is not an unprimeable number, because it can be changed into a prime (159564649) 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, 11397468 + ... + 11397481.

It is an arithmetic number, because the mean of its divisors is an integer number (45589900).

Almost surely, 2^159564643 is an apocalyptic number.

159564643 is a deficient number, since it is larger than the sum of its proper divisors (22794957).

159564643 is an equidigital number, since it uses as much as digits as its factorization.

159564643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22794956.

The product of its digits is 388800, while the sum is 43.

The square root of 159564643 is about 12631.8899219396. The cubic root of 159564643 is about 542.3906840836.

The spelling of 159564643 in words is "one hundred fifty-nine million, five hundred sixty-four thousand, six hundred forty-three".