1101803985 has 16 divisors (see below), whose sum is σ = 1958762880. Its totient is φ = 587628720.

The previous prime is 1101803981. The next prime is 1101803987. The reversal of 1101803985 is 5893081011.

It is not a de Polignac number, because 1101803985 - 2² = 1101803981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101803981) 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, 4080621 + ... + 4080890.

It is an arithmetic number, because the mean of its divisors is an integer number (122422680).

Almost surely, 2^1101803985 is an apocalyptic number.

1101803985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1101803985 is a deficient number, since it is larger than the sum of its proper divisors (856958895).

1101803985 is an equidigital number, since it uses as much as digits as its factorization.

1101803985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161525 (or 8161519 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1101803985 is about 33193.4328595281. The cubic root of 1101803985 is about 1032.8441156887.

Adding to 1101803985 its reverse (5893081011), we get a palindrome (6994884996).

The spelling of 1101803985 in words is "one billion, one hundred one million, eight hundred three thousand, nine hundred eighty-five".