6845918409 has 24 divisors (see below), whose sum is σ = 10805201472. Its totient is φ = 4142236320.

The previous prime is 6845918407. The next prime is 6845918441. The reversal of 6845918409 is 9048195486.

6845918409 is a `hidden beast` number, since 6 + 8 + 4 + 591 + 8 + 40 + 9 = 666.

It is not a de Polignac number, because 6845918409 - 2¹ = 6845918407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6845918407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4284 + ... + 117090.

It is an arithmetic number, because the mean of its divisors is an integer number (450216728).

Almost surely, 2^6845918409 is an apocalyptic number.

It is an amenable number.

6845918409 is a deficient number, since it is larger than the sum of its proper divisors (3959283063).

6845918409 is a wasteful number, since it uses less digits than its factorization.

6845918409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113437 (or 113434 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 6845918409 is about 82740.0653190460. The cubic root of 6845918409 is about 1898.7913281354.

It can be divided in two parts, 68459 and 18409, that added together give a palindrome (86868).

The spelling of 6845918409 in words is "six billion, eight hundred forty-five million, nine hundred eighteen thousand, four hundred nine".