158618 has 4 divisors (see below), whose sum is σ = 237930. Its totient is φ = 79308.

The previous prime is 158617. The next prime is 158621. The reversal of 158618 is 816851.

158618 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 104329 + 54289 = 323^2 + 233^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158618.

It is not an unprimeable number, because it can be changed into a prime (158611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39653 + ... + 39656.

2¹⁵⁸⁶¹⁸ is an apocalyptic number.

158618 is a deficient number, since it is larger than the sum of its proper divisors (79312).

158618 is an equidigital number, since it uses as much as digits as its factorization.

158618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79311.

The product of its digits is 1920, while the sum is 29.

The square root of 158618 is about 398.2687534819. The cubic root of 158618 is about 54.1315949167.

The spelling of 158618 in words is "one hundred fifty-eight thousand, six hundred eighteen".