1818271158 has 32 divisors (see below), whose sum is σ = 4175936640. Its totient is φ = 521991360.

The previous prime is 1818271151. The next prime is 1818271171. The reversal of 1818271158 is 8511728181.

It is a super-2 number, since 2×1818271158² = 6612220008029321928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818271151) 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, 723735 + ... + 726242.

It is an arithmetic number, because the mean of its divisors is an integer number (130498020).

Almost surely, 2^1818271158 is an apocalyptic number.

1818271158 is an abundant number, since it is smaller than the sum of its proper divisors (2357665482).

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

1818271158 is a wasteful number, since it uses less digits than its factorization.

1818271158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450012.

The product of its digits is 35840, while the sum is 42.

The square root of 1818271158 is about 42641.1908604814. The cubic root of 1818271158 is about 1220.5424350393.

The spelling of 1818271158 in words is "one billion, eight hundred eighteen million, two hundred seventy-one thousand, one hundred fifty-eight".