158686474 has 4 divisors (see below), whose sum is σ = 238029714. Its totient is φ = 79343236.

The previous prime is 158686447. The next prime is 158686477. The reversal of 158686474 is 474686851.

158686474 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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., 148669249 + 10017225 = 12193^2 + 3165^2 .

It is not an unprimeable number, because it can be changed into a prime (158686477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39671617 + ... + 39671620.

Almost surely, 2^158686474 is an apocalyptic number.

158686474 is a deficient number, since it is larger than the sum of its proper divisors (79343240).

158686474 is an equidigital number, since it uses as much as digits as its factorization.

158686474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79343239.

The product of its digits is 1290240, while the sum is 49.

The square root of 158686474 is about 12597.0819636930. The cubic root of 158686474 is about 541.3938317440.

The spelling of 158686474 in words is "one hundred fifty-eight million, six hundred eighty-six thousand, four hundred seventy-four".