6811628351813 has 4 divisors (see below), whose sum is σ = 6812664032460. Its totient is φ = 6810592671168.

The previous prime is 6811628351779. The next prime is 6811628351851. The reversal of 6811628351813 is 3181538261186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5032026995524 + 1779601356289 = 2243218^2 + 1334017^2 .

It is a cyclic number.

It is not a de Polignac number, because 6811628351813 - 2¹⁰ = 6811628350789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811628357813) 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 3 ways as a sum of consecutive naturals, for example, 517830458 + ... + 517843611.

It is an arithmetic number, because the mean of its divisors is an integer number (1703166008115).

Almost surely, 2^{6811628351813} is an apocalyptic number.

It is an amenable number.

6811628351813 is a deficient number, since it is larger than the sum of its proper divisors (1035680647).

6811628351813 is a wasteful number, since it uses less digits than its factorization.

6811628351813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035680646.

The product of its digits is 1658880, while the sum is 53.

The spelling of 6811628351813 in words is "six trillion, eight hundred eleven billion, six hundred twenty-eight million, three hundred fifty-one thousand, eight hundred thirteen".