158109009 has 8 divisors (see below), whose sum is σ = 212421792. Its totient is φ = 104601120.

The previous prime is 158108947. The next prime is 158109019. The reversal of 158109009 is 900901851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-158109009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158109019) 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 7 ways as a sum of consecutive naturals, for example, 200764 + ... + 201549.

It is an arithmetic number, because the mean of its divisors is an integer number (26552724).

Almost surely, 2^158109009 is an apocalyptic number.

It is an amenable number.

158109009 is a deficient number, since it is larger than the sum of its proper divisors (54312783).

158109009 is a wasteful number, since it uses less digits than its factorization.

158109009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402447.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 158109009 is about 12574.1404875244. The cubic root of 158109009 is about 540.7363172116.

The spelling of 158109009 in words is "one hundred fifty-eight million, one hundred nine thousand, nine".