16785605063 has 4 divisors (see below), whose sum is σ = 16787282520. Its totient is φ = 16783927608.

The previous prime is 16785604987. The next prime is 16785605069. The reversal of 16785605063 is 36050658761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16785605063 - 2²⁰ = 16784556487 is a prime.

It is a super-5 number, since 5×16785605063⁵ (a number of 52 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16785604999 and 16785605017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16785605069) 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 3 ways as a sum of consecutive naturals, for example, 823628 + ... + 843761.

It is an arithmetic number, because the mean of its divisors is an integer number (4196820630).

Almost surely, 2^16785605063 is an apocalyptic number.

16785605063 is a deficient number, since it is larger than the sum of its proper divisors (1677457).

16785605063 is a wasteful number, since it uses less digits than its factorization.

16785605063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677456.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 16785605063 in words is "sixteen billion, seven hundred eighty-five million, six hundred five thousand, sixty-three".