6816208759369 has 3 divisors (see below), whose sum is σ = 6816211370157. Its totient is φ = 6816206148582.

The previous prime is 6816208759343. The next prime is 6816208759397. The reversal of 6816208759369 is 9639578026186.

The square root of 6816208759369 is 2610787.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6816208759369 - 2⁴¹ = 4617185503817 is a prime.

It is a super-2 number, since 2×6816208759369² (a number of 26 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 = 6816208759298 and 6816208759307.

It is not an unprimeable number, because it can be changed into a prime (6816208759309) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1305394 + ... + 3916180.

It is an arithmetic number, because the mean of its divisors is an integer number (2272070456719).

Almost surely, 2^{6816208759369} is an apocalyptic number.

6816208759369 is the 2610787-th square number.

6816208759369 is the 1305394-th centered octagonal number.

It is an amenable number.

6816208759369 is a deficient number, since it is larger than the sum of its proper divisors (2610788).

6816208759369 is an frugal number, since it uses more digits than its factorization.

6816208759369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221574 (or 2610787 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 70.

The spelling of 6816208759369 in words is "six trillion, eight hundred sixteen billion, two hundred eight million, seven hundred fifty-nine thousand, three hundred sixty-nine".