158163506 has 12 divisors (see below), whose sum is σ = 245710842. Its totient is φ = 76353984.

The previous prime is 158163497. The next prime is 158163517. The reversal of 158163506 is 605361851.

It can be written as a sum of positive squares in 3 ways, for example, as 141015625 + 17147881 = 11875^2 + 4141^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 45335 + ... + 48698.

Almost surely, 2^158163506 is an apocalyptic number.

158163506 is a deficient number, since it is larger than the sum of its proper divisors (87547336).

158163506 is an equidigital number, since it uses as much as digits as its factorization.

158163506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94093 (or 94064 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 158163506 is about 12576.3073276698. The cubic root of 158163506 is about 540.7984370578.

The spelling of 158163506 in words is "one hundred fifty-eight million, one hundred sixty-three thousand, five hundred six".