158816538 has 48 divisors (see below), whose sum is σ = 358656480. Its totient is φ = 52670736.

The previous prime is 158816531. The next prime is 158816549. The reversal of 158816538 is 835618851.

158816538 is a `hidden beast` number, since 1 + 588 + 1 + 65 + 3 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 158816493 and 158816502.

It is not an unprimeable number, because it can be changed into a prime (158816531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110581 + ... + 112007.

It is an arithmetic number, because the mean of its divisors is an integer number (7472010).

Almost surely, 2^158816538 is an apocalyptic number.

158816538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158816538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179328240).

158816538 is an abundant number, since it is smaller than the sum of its proper divisors (199839942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158816538 is a wasteful number, since it uses less digits than its factorization.

158816538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1661 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 158816538 is about 12602.2433717176. The cubic root of 158816538 is about 541.5417053383.

The spelling of 158816538 in words is "one hundred fifty-eight million, eight hundred sixteen thousand, five hundred thirty-eight".