6819499400365 has 16 divisors (see below), whose sum is σ = 8297028804528. Its totient is φ = 5379874039296.

The previous prime is 6819499400353. The next prime is 6819499400369. The reversal of 6819499400365 is 5630049949186.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 605936139561 + 6213563260804 = 778419^2 + 2492702^2 .

It is a cyclic number.

It is not a de Polignac number, because 6819499400365 - 2¹¹ = 6819499398317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6819499400297 and 6819499400306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6819499400369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266319 + ... + 3702691.

It is an arithmetic number, because the mean of its divisors is an integer number (518564300283).

Almost surely, 2^{6819499400365} is an apocalyptic number.

It is an amenable number.

6819499400365 is a deficient number, since it is larger than the sum of its proper divisors (1477529404163).

6819499400365 is a wasteful number, since it uses less digits than its factorization.

6819499400365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441888.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 6819499400365 in words is "six trillion, eight hundred nineteen billion, four hundred ninety-nine million, four hundred thousand, three hundred sixty-five".