158209181089 has 4 divisors (see below), whose sum is σ = 167515603524. Its totient is φ = 148902758656.

The previous prime is 158209181077. The next prime is 158209181131. The reversal of 158209181089 is 980181902851.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60922580625 + 97286600464 = 246825^2 + 311908^2 .

It is a cyclic number.

It is not a de Polignac number, because 158209181089 - 2³⁵ = 123849442721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158209181059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4653211192 + ... + 4653211225.

It is an arithmetic number, because the mean of its divisors is an integer number (41878900881).

Almost surely, 2^158209181089 is an apocalyptic number.

It is an amenable number.

158209181089 is a deficient number, since it is larger than the sum of its proper divisors (9306422435).

158209181089 is an equidigital number, since it uses as much as digits as its factorization.

158209181089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306422434.

The product of its (nonzero) digits is 414720, while the sum is 52.

The spelling of 158209181089 in words is "one hundred fifty-eight billion, two hundred nine million, one hundred eighty-one thousand, eighty-nine".