8213840397306 has 24 divisors (see below), whose sum is σ = 18230718932244. Its totient is φ = 2671167608640.

The previous prime is 8213840397241. The next prime is 8213840397331. The reversal of 8213840397306 is 6037930483128.

8213840397306 is a `hidden beast` number, since 8 + 213 + 8 + 4 + 0 + 397 + 30 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7596963675081 + 616876722225 = 2756259^2 + 785415^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5564931781 + ... + 5564933256.

Almost surely, 2^{8213840397306} is an apocalyptic number.

8213840397306 is an abundant number, since it is smaller than the sum of its proper divisors (10016878534938).

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

8213840397306 is a wasteful number, since it uses less digits than its factorization.

8213840397306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11129865086 (or 11129865083 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 8213840397306 in words is "eight trillion, two hundred thirteen billion, eight hundred forty million, three hundred ninety-seven thousand, three hundred six".