6814167981881 has 16 divisors (see below), whose sum is σ = 7933334875200. Its totient is φ = 5797895848128.

The previous prime is 6814167981869. The next prime is 6814167981893. The reversal of 6814167981881 is 1881897614186.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6814167981869) and next prime (6814167981893).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6814167981881 is a prime.

It is a super-2 number, since 2×6814167981881² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6814167981581) 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 15 ways as a sum of consecutive naturals, for example, 372797951 + ... + 372816228.

It is an arithmetic number, because the mean of its divisors is an integer number (495833429700).

Almost surely, 2^{6814167981881} is an apocalyptic number.

It is an amenable number.

6814167981881 is a deficient number, since it is larger than the sum of its proper divisors (1119166893319).

6814167981881 is a wasteful number, since it uses less digits than its factorization.

6814167981881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745614248.

The product of its digits is 37158912, while the sum is 68.

The spelling of 6814167981881 in words is "six trillion, eight hundred fourteen billion, one hundred sixty-seven million, nine hundred eighty-one thousand, eight hundred eighty-one".