158728587289 has 2 divisors, whose sum is σ = 158728587290. Its totient is φ = 158728587288.

The previous prime is 158728587253. The next prime is 158728587317. The reversal of 158728587289 is 982785827851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143104837264 + 15623750025 = 378292^2 + 124995^2 .

It is a cyclic number.

It is not a de Polignac number, because 158728587289 - 2⁹ = 158728586777 is a prime.

It is not a weakly prime, because it can be changed into another prime (158728585289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79364293644 + 79364293645.

It is an arithmetic number, because the mean of its divisors is an integer number (79364293645).

Almost surely, 2^158728587289 is an apocalyptic number.

It is an amenable number.

158728587289 is a deficient number, since it is larger than the sum of its proper divisors (1).

158728587289 is an equidigital number, since it uses as much as digits as its factorization.

158728587289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180633600, while the sum is 70.

The spelling of 158728587289 in words is "one hundred fifty-eight billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, two hundred eighty-nine".