16808512643 has 8 divisors (see below), whose sum is σ = 18542975136. Its totient is φ = 15137121600.

The previous prime is 16808512619. The next prime is 16808512681. The reversal of 16808512643 is 34621580861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16808512643 - 2⁶ = 16808512579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16808512594 and 16808512603.

It is not an unprimeable number, because it can be changed into a prime (16808512043) 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 7 ways as a sum of consecutive naturals, for example, 15767303 + ... + 15768368.

It is an arithmetic number, because the mean of its divisors is an integer number (2317871892).

Almost surely, 2^16808512643 is an apocalyptic number.

16808512643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16808512643 is a deficient number, since it is larger than the sum of its proper divisors (1734462493).

16808512643 is a wasteful number, since it uses less digits than its factorization.

16808512643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31535725.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 16808512643 in words is "sixteen billion, eight hundred eight million, five hundred twelve thousand, six hundred forty-three".