158111409 has 4 divisors (see below), whose sum is σ = 210815216. Its totient is φ = 105407604.

The previous prime is 158111399. The next prime is 158111411. The reversal of 158111409 is 904111851.

It is a happy number.

158111409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 158111409 - 2¹¹ = 158109361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158111419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26351899 + ... + 26351904.

It is an arithmetic number, because the mean of its divisors is an integer number (52703804).

Almost surely, 2^158111409 is an apocalyptic number.

It is an amenable number.

158111409 is a deficient number, since it is larger than the sum of its proper divisors (52703807).

158111409 is an equidigital number, since it uses as much as digits as its factorization.

158111409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52703806.

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 158111409 is about 12574.2359211206. The cubic root of 158111409 is about 540.7390532155.

The spelling of 158111409 in words is "one hundred fifty-eight million, one hundred eleven thousand, four hundred nine".