16809696601369 has 27 divisors (see below), whose sum is σ = 19779320429661. Its totient is φ = 14244255453120.

The previous prime is 16809696601351. The next prime is 16809696601403. The reversal of 16809696601369 is 96310669690861.

The square root of 16809696601369 is 4099963.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5455088085769 + 11354608515600 = 2335613^2 + 3369660^2 .

It is not a de Polignac number, because 16809696601369 - 2¹⁵ = 16809696568601 is a prime.

It is a super-2 number, since 2×16809696601369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16809696601298 and 16809696601307.

It is not an unprimeable number, because it can be changed into a prime (16809696607369) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2554273659 + ... + 2554280239.

Almost surely, 2^{16809696601369} is an apocalyptic number.

16809696601369 is the 4099963-rd square number.

16809696601369 is the 2049982-nd centered octagonal number.

It is an amenable number.

16809696601369 is a deficient number, since it is larger than the sum of its proper divisors (2969623828292).

16809696601369 is an frugal number, since it uses more digits than its factorization.

16809696601369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13354 (or 6677 counting only the distinct ones).

The product of its (nonzero) digits is 136048896, while the sum is 70.

The spelling of 16809696601369 in words is "sixteen trillion, eight hundred nine billion, six hundred ninety-six million, six hundred one thousand, three hundred sixty-nine".