1085887665 has 96 divisors (see below), whose sum is σ = 2069776800. Its totient is φ = 524451840.

The previous prime is 1085887651. The next prime is 1085887667. The reversal of 1085887665 is 5667885801.

1085887665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 669360384 + 416527281 = 25872^2 + 20409^2 .

It is not a de Polignac number, because 1085887665 - 2⁸ = 1085887409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1085887667) 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 95 ways as a sum of consecutive naturals, for example, 2791291 + ... + 2791679.

It is an arithmetic number, because the mean of its divisors is an integer number (21560175).

Almost surely, 2^1085887665 is an apocalyptic number.

1085887665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1085887665 is a deficient number, since it is larger than the sum of its proper divisors (983889135).

1085887665 is a wasteful number, since it uses less digits than its factorization.

1085887665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The square root of 1085887665 is about 32952.8096677658. The cubic root of 1085887665 is about 1027.8465913009.

The spelling of 1085887665 in words is "one billion, eighty-five million, eight hundred eighty-seven thousand, six hundred sixty-five".