159640549609 has 2 divisors, whose sum is σ = 159640549610. Its totient is φ = 159640549608.

The previous prime is 159640549589. The next prime is 159640549669. The reversal of 159640549609 is 906945046951.

159640549609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110109821584 + 49530728025 = 331828^2 + 222555^2 .

It is an emirp because it is prime and its reverse (906945046951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 159640549609 - 2⁵ = 159640549577 is a prime.

It is not a weakly prime, because it can be changed into another prime (159640549669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79820274804 + 79820274805.

It is an arithmetic number, because the mean of its divisors is an integer number (79820274805).

Almost surely, 2^159640549609 is an apocalyptic number.

It is an amenable number.

159640549609 is a deficient number, since it is larger than the sum of its proper divisors (1).

159640549609 is an equidigital number, since it uses as much as digits as its factorization.

159640549609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 159640549609 in words is "one hundred fifty-nine billion, six hundred forty million, five hundred forty-nine thousand, six hundred nine".