8345946821 has 32 divisors (see below), whose sum is σ = 9224478720. Its totient is φ = 7521336000.

The previous prime is 8345946811. The next prime is 8345946823. The reversal of 8345946821 is 1286495438.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8345946821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8345946821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8345946823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9516035 + ... + 9516911.

It is an arithmetic number, because the mean of its divisors is an integer number (288264960).

Almost surely, 2^8345946821 is an apocalyptic number.

It is an amenable number.

8345946821 is a deficient number, since it is larger than the sum of its proper divisors (878531899).

8345946821 is a wasteful number, since it uses less digits than its factorization.

8345946821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its digits is 1658880, while the sum is 50.

The square root of 8345946821 is about 91356.1537117232. The cubic root of 8345946821 is about 2028.4230532608.

The spelling of 8345946821 in words is "eight billion, three hundred forty-five million, nine hundred forty-six thousand, eight hundred twenty-one".