158261634809 has 2 divisors, whose sum is σ = 158261634810. Its totient is φ = 158261634808.

The previous prime is 158261634757. The next prime is 158261634821. The reversal of 158261634809 is 908436162851.

158261634809 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., 89384256784 + 68877378025 = 298972^2 + 262445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158261634809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (158261234809) 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, 79130817404 + 79130817405.

It is an arithmetic number, because the mean of its divisors is an integer number (79130817405).

Almost surely, 2^158261634809 is an apocalyptic number.

It is an amenable number.

158261634809 is a deficient number, since it is larger than the sum of its proper divisors (1).

158261634809 is an equidigital number, since it uses as much as digits as its factorization.

158261634809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 158261634809 in words is "one hundred fifty-eight billion, two hundred sixty-one million, six hundred thirty-four thousand, eight hundred nine".