6845751218971 has 4 divisors (see below), whose sum is σ = 7823715678832. Its totient is φ = 5867786759112.

The previous prime is 6845751218947. The next prime is 6845751219001. The reversal of 6845751218971 is 1798121575486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6845751218971 - 2¹¹ = 6845751216923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6845751218921) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 488982229920 + ... + 488982229933.

It is an arithmetic number, because the mean of its divisors is an integer number (1955928919708).

Almost surely, 2^{6845751218971} is an apocalyptic number.

6845751218971 is a deficient number, since it is larger than the sum of its proper divisors (977964459861).

6845751218971 is an equidigital number, since it uses as much as digits as its factorization.

6845751218971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977964459860.

The product of its digits is 33868800, while the sum is 64.

The spelling of 6845751218971 in words is "six trillion, eight hundred forty-five billion, seven hundred fifty-one million, two hundred eighteen thousand, nine hundred seventy-one".