158445449 has 4 divisors (see below), whose sum is σ = 158713236. Its totient is φ = 158177664.

The previous prime is 158445439. The next prime is 158445451. The reversal of 158445449 is 944544851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944544851 = 191 ⋅4945261.

It can be written as a sum of positive squares in 2 ways, for example, as 30913600 + 127531849 = 5560^2 + 11293^2 .

It is a cyclic number.

It is not a de Polignac number, because 158445449 - 2²⁰ = 157396873 is a prime.

It is a super-3 number, since 3×158445449³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158445439) 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, 133004 + ... + 134189.

It is an arithmetic number, because the mean of its divisors is an integer number (39678309).

Almost surely, 2^158445449 is an apocalyptic number.

It is an amenable number.

158445449 is a deficient number, since it is larger than the sum of its proper divisors (267787).

158445449 is an equidigital number, since it uses as much as digits as its factorization.

158445449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267786.

The product of its digits is 460800, while the sum is 44.

The square root of 158445449 is about 12587.5116285944. The cubic root of 158445449 is about 541.1195895721.

The spelling of 158445449 in words is "one hundred fifty-eight million, four hundred forty-five thousand, four hundred forty-nine".