1118385481 has 16 divisors (see below), whose sum is σ = 1171307520. Its totient is φ = 1066602240.

The previous prime is 1118385451. The next prime is 1118385487. The reversal of 1118385481 is 1845838111.

It is a cyclic number.

It is not a de Polignac number, because 1118385481 - 2⁵ = 1118385449 is a prime.

It is a super-2 number, since 2×1118385481² = 2501572168223202722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1118385487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1260420 + ... + 1261306.

It is an arithmetic number, because the mean of its divisors is an integer number (73206720).

Almost surely, 2^1118385481 is an apocalyptic number.

It is an amenable number.

1118385481 is a deficient number, since it is larger than the sum of its proper divisors (52922039).

1118385481 is an equidigital number, since it uses as much as digits as its factorization.

1118385481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its digits is 30720, while the sum is 40.

The square root of 1118385481 is about 33442.2708708604. The cubic root of 1118385481 is about 1037.9995696604. Note that the first 3 decimals are identical.

The spelling of 1118385481 in words is "one billion, one hundred eighteen million, three hundred eighty-five thousand, four hundred eighty-one".