158187320889 has 32 divisors (see below), whose sum is σ = 234167265024. Its totient is φ = 94354709760.

The previous prime is 158187320881. The next prime is 158187320917. The reversal of 158187320889 is 988023781851.

It is not a de Polignac number, because 158187320889 - 2³ = 158187320881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158187320881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171099 + ... + 587919.

It is an arithmetic number, because the mean of its divisors is an integer number (7317727032).

Almost surely, 2^158187320889 is an apocalyptic number.

It is an amenable number.

158187320889 is a deficient number, since it is larger than the sum of its proper divisors (75979944135).

158187320889 is a wasteful number, since it uses less digits than its factorization.

158187320889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417137.

The product of its (nonzero) digits is 7741440, while the sum is 60.

The spelling of 158187320889 in words is "one hundred fifty-eight billion, one hundred eighty-seven million, three hundred twenty thousand, eight hundred eighty-nine".