16909805493503 has 8 divisors (see below), whose sum is σ = 18509093529696. Its totient is φ = 15353165138400.

The previous prime is 16909805493443. The next prime is 16909805493533. The reversal of 16909805493503 is 30539450890961.

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 16909805493503 - 2²⁸ = 16909537058047 is a prime.

It is a super-2 number, since 2×16909805493503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16909805493533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10661919443 + ... + 10661921028.

It is an arithmetic number, because the mean of its divisors is an integer number (2313636691212).

Almost surely, 2^{16909805493503} is an apocalyptic number.

16909805493503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16909805493503 is a deficient number, since it is larger than the sum of its proper divisors (1599288036193).

16909805493503 is a wasteful number, since it uses less digits than its factorization.

16909805493503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21323840545.

The product of its (nonzero) digits is 31492800, while the sum is 62.

The spelling of 16909805493503 in words is "sixteen trillion, nine hundred nine billion, eight hundred five million, four hundred ninety-three thousand, five hundred three".