6813857226 has 128 divisors (see below), whose sum is σ = 16568893440. Its totient is φ = 1845043200.

The previous prime is 6813857207. The next prime is 6813857251. The reversal of 6813857226 is 6227583186.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1362186 + ... + 1367178.

It is an arithmetic number, because the mean of its divisors is an integer number (129444480).

Almost surely, 2^6813857226 is an apocalyptic number.

6813857226 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6813857226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8284446720).

6813857226 is an abundant number, since it is smaller than the sum of its proper divisors (9755036214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6813857226 is a wasteful number, since it uses less digits than its factorization.

6813857226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its digits is 967680, while the sum is 48.

The square root of 6813857226 is about 82546.0915246749. The cubic root of 6813857226 is about 1895.8225139410.

The spelling of 6813857226 in words is "six billion, eight hundred thirteen million, eight hundred fifty-seven thousand, two hundred twenty-six".