6845821616 has 20 divisors (see below), whose sum is σ = 13412813400. Its totient is φ = 3384450432.

The previous prime is 6845821601. The next prime is 6845821621. The reversal of 6845821616 is 6161285486.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402306 + ... + 2405153.

It is an arithmetic number, because the mean of its divisors is an integer number (670640670).

Almost surely, 2^6845821616 is an apocalyptic number.

It is an amenable number.

6845821616 is a deficient number, since it is larger than the sum of its proper divisors (6566991784).

6845821616 is a wasteful number, since it uses less digits than its factorization.

6845821616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807556 (or 4807550 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 6845821616 is about 82739.4803947910. The cubic root of 6845821616 is about 1898.7823792228.

The spelling of 6845821616 in words is "six billion, eight hundred forty-five million, eight hundred twenty-one thousand, six hundred sixteen".