881680386989 has 2 divisors, whose sum is σ = 881680386990. Its totient is φ = 881680386988.

The previous prime is 881680386973. The next prime is 881680387039. The reversal of 881680386989 is 989683086188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806996788900 + 74683598089 = 898330^2 + 273283^2 .

It is a cyclic number.

It is not a de Polignac number, because 881680386989 - 2⁴ = 881680386973 is a prime.

It is a super-2 number, since 2×881680386989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881680386589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440840193494 + 440840193495.

It is an arithmetic number, because the mean of its divisors is an integer number (440840193495).

Almost surely, 2^881680386989 is an apocalyptic number.

It is an amenable number.

881680386989 is a deficient number, since it is larger than the sum of its proper divisors (1).

881680386989 is an equidigital number, since it uses as much as digits as its factorization.

881680386989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286654464, while the sum is 74.

The spelling of 881680386989 in words is "eight hundred eighty-one billion, six hundred eighty million, three hundred eighty-six thousand, nine hundred eighty-nine".