158172849 has 6 divisors (see below), whose sum is σ = 228471906. Its totient is φ = 105448560.

The previous prime is 158172821. The next prime is 158172869. The reversal of 158172849 is 948271851.

158172849 is a `hidden beast` number, since 1 + 581 + 7 + 28 + 49 = 666.

158172849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 133818624 + 24354225 = 11568^2 + 4935^2 .

It is not a de Polignac number, because 158172849 - 2⁹ = 158172337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158172809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8787372 + ... + 8787389.

It is an arithmetic number, because the mean of its divisors is an integer number (38078651).

Almost surely, 2^158172849 is an apocalyptic number.

It is an amenable number.

158172849 is a deficient number, since it is larger than the sum of its proper divisors (70299057).

158172849 is a wasteful number, since it uses less digits than its factorization.

158172849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17574767 (or 17574764 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 158172849 is about 12576.6787746209. The cubic root of 158172849 is about 540.8090854904.

The spelling of 158172849 in words is "one hundred fifty-eight million, one hundred seventy-two thousand, eight hundred forty-nine".