158541608521 has 2 divisors, whose sum is σ = 158541608522. Its totient is φ = 158541608520.

The previous prime is 158541608419. The next prime is 158541608557. The reversal of 158541608521 is 125806145851.

It is a happy number.

158541608521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85184594496 + 73357014025 = 291864^2 + 270845^2 .

It is a cyclic number.

It is not a de Polignac number, because 158541608521 - 2⁹ = 158541608009 is a prime.

It is not a weakly prime, because it can be changed into another prime (158541608921) 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, 79270804260 + 79270804261.

It is an arithmetic number, because the mean of its divisors is an integer number (79270804261).

Almost surely, 2^158541608521 is an apocalyptic number.

It is an amenable number.

158541608521 is a deficient number, since it is larger than the sum of its proper divisors (1).

158541608521 is an equidigital number, since it uses as much as digits as its factorization.

158541608521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 46.

The spelling of 158541608521 in words is "one hundred fifty-eight billion, five hundred forty-one million, six hundred eight thousand, five hundred twenty-one".