1081481865 has 16 divisors (see below), whose sum is σ = 1735513728. Its totient is φ = 575076096.

The previous prime is 1081481857. The next prime is 1081481867. The reversal of 1081481865 is 5681841801.

It is not a de Polignac number, because 1081481865 - 2³ = 1081481857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1081481867) 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, 101917 + ... + 112026.

It is an arithmetic number, because the mean of its divisors is an integer number (108469608).

Almost surely, 2^1081481865 is an apocalyptic number.

1081481865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1081481865 is a deficient number, since it is larger than the sum of its proper divisors (654031863).

1081481865 is a wasteful number, since it uses less digits than its factorization.

1081481865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214288.

The product of its (nonzero) digits is 61440, while the sum is 42.

The square root of 1081481865 is about 32885.8915798249. The cubic root of 1081481865 is about 1026.4546041996.

The spelling of 1081481865 in words is "one billion, eighty-one million, four hundred eighty-one thousand, eight hundred sixty-five".