6813220545794 has 8 divisors (see below), whose sum is σ = 11005971650940. Its totient is φ = 3144563328816.

The previous prime is 6813220545739. The next prime is 6813220545797. The reversal of 6813220545794 is 4975450223186.

It can be written as a sum of positive squares in 2 ways, for example, as 5545963770169 + 1267256775625 = 2354987^2 + 1125725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6813220545797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131023472009 + ... + 131023472060.

It is a 1-persistent number, because it is pandigital, but 2⋅6813220545794 = 13626441091588 is not.

Almost surely, 2^{6813220545794} is an apocalyptic number.

6813220545794 is a deficient number, since it is larger than the sum of its proper divisors (4192751105146).

6813220545794 is a wasteful number, since it uses less digits than its factorization.

6813220545794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262046944084.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 6813220545794 in words is "six trillion, eight hundred thirteen billion, two hundred twenty million, five hundred forty-five thousand, seven hundred ninety-four".