158163813 has 16 divisors (see below), whose sum is σ = 236595840. Its totient is φ = 104416992.

The previous prime is 158163779. The next prime is 158163827. The reversal of 158163813 is 318361851.

158163813 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 638 + 13 = 666.

It is not a de Polignac number, because 158163813 - 2¹² = 158159717 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158163833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25656 + ... + 31217.

It is an arithmetic number, because the mean of its divisors is an integer number (14787240).

Almost surely, 2^158163813 is an apocalyptic number.

It is an amenable number.

158163813 is a deficient number, since it is larger than the sum of its proper divisors (78432027).

158163813 is a wasteful number, since it uses less digits than its factorization.

158163813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56985 (or 56979 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 158163813 is about 12576.3195331544. The cubic root of 158163813 is about 540.7987869595.

The spelling of 158163813 in words is "one hundred fifty-eight million, one hundred sixty-three thousand, eight hundred thirteen".