16530530985 has 36 divisors (see below), whose sum is σ = 29607101316. Its totient is φ = 8531864640.

The previous prime is 16530530963. The next prime is 16530530987. The reversal of 16530530985 is 58903503561.

16530530985 is a `hidden beast` number, since 1 + 6 + 5 + 30 + 530 + 9 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9336777129 + 7193753856 = 96627^2 + 84816^2 .

It is not a de Polignac number, because 16530530985 - 2⁵ = 16530530953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16530530985.

It is not an unprimeable number, because it can be changed into a prime (16530530987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147882 + ... + 234371.

It is an arithmetic number, because the mean of its divisors is an integer number (822419481).

Almost surely, 2^16530530985 is an apocalyptic number.

16530530985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16530530985 is a deficient number, since it is larger than the sum of its proper divisors (13076570331).

16530530985 is a wasteful number, since it uses less digits than its factorization.

16530530985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382326 (or 382292 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 16530530985 in words is "sixteen billion, five hundred thirty million, five hundred thirty thousand, nine hundred eighty-five".