6881407534889 has 2 divisors, whose sum is σ = 6881407534890. Its totient is φ = 6881407534888.

The previous prime is 6881407534817. The next prime is 6881407534933. The reversal of 6881407534889 is 9884357041886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4299472749289 + 2581934785600 = 2073517^2 + 1606840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881407534889 - 2⁸ = 6881407534633 is a prime.

It is a super-2 number, since 2×6881407534889² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6881407534189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440703767444 + 3440703767445.

It is an arithmetic number, because the mean of its divisors is an integer number (3440703767445).

Almost surely, 2^{6881407534889} is an apocalyptic number.

It is an amenable number.

6881407534889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881407534889 is an equidigital number, since it uses as much as digits as its factorization.

6881407534889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 371589120, while the sum is 71.

The spelling of 6881407534889 in words is "six trillion, eight hundred eighty-one billion, four hundred seven million, five hundred thirty-four thousand, eight hundred eighty-nine".