1818480081 has 32 divisors (see below), whose sum is σ = 2678417280. Its totient is φ = 1097363520.

The previous prime is 1818480067. The next prime is 1818480113. The reversal of 1818480081 is 1800848181.

It is not a de Polignac number, because 1818480081 - 2¹⁹ = 1817955793 is a prime.

It is a super-2 number, since 2×1818480081² = 6613739609987533122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1818481081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1073271 + ... + 1074963.

It is an arithmetic number, because the mean of its divisors is an integer number (83700540).

Almost surely, 2^1818480081 is an apocalyptic number.

1818480081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1818480081 is a deficient number, since it is larger than the sum of its proper divisors (859937199).

1818480081 is a wasteful number, since it uses less digits than its factorization.

1818480081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 39.

The square root of 1818480081 is about 42643.6405692572. The cubic root of 1818480081 is about 1220.5891808396.

The spelling of 1818480081 in words is "one billion, eight hundred eighteen million, four hundred eighty thousand, eighty-one".