1818272818 has 16 divisors (see below), whose sum is σ = 2764321560. Its totient is φ = 896904576.

The previous prime is 1818272803. The next prime is 1818272821. The reversal of 1818272818 is 8182728181.

It can be written as a sum of positive squares in 4 ways, for example, as 1055795049 + 762477769 = 32493^2 + 27613^2 .

It is a super-2 number, since 2×1818272818² = 6612232081355322248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32896 + ... + 68692.

Almost surely, 2^1818272818 is an apocalyptic number.

1818272818 is a deficient number, since it is larger than the sum of its proper divisors (946048742).

1818272818 is a wasteful number, since it uses less digits than its factorization.

1818272818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36141.

The product of its digits is 114688, while the sum is 46.

The square root of 1818272818 is about 42641.2103252241. The cubic root of 1818272818 is about 1220.5428064727.

The spelling of 1818272818 in words is "one billion, eight hundred eighteen million, two hundred seventy-two thousand, eight hundred eighteen".