6845669707840 has 56 divisors (see below), whose sum is σ = 16302061530432. Its totient is φ = 2738131729920.

The previous prime is 6845669707837. The next prime is 6845669707843. The reversal of 6845669707840 is 487079665486.

It is an interprime number because it is at equal distance from previous prime (6845669707837) and next prime (6845669707843).

It is a self number, because there is not a number n which added to its sum of digits gives 6845669707840.

It is not an unprimeable number, because it can be changed into a prime (6845669707843) 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 7 ways as a sum of consecutive naturals, for example, 6040645 + ... + 7083835.

Almost surely, 2^{6845669707840} is an apocalyptic number.

It is an amenable number.

6845669707840 is an abundant number, since it is smaller than the sum of its proper divisors (9456391822592).

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

6845669707840 is a wasteful number, since it uses less digits than its factorization.

6845669707840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063715 (or 1063705 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 70.

The spelling of 6845669707840 in words is "six trillion, eight hundred forty-five billion, six hundred sixty-nine million, seven hundred seven thousand, eight hundred forty".