3984646882861 has 2 divisors, whose sum is σ = 3984646882862. Its totient is φ = 3984646882860.

The previous prime is 3984646882841. The next prime is 3984646882873. The reversal of 3984646882861 is 1682886464893.

3984646882861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2962133577225 + 1022513305636 = 1721085^2 + 1011194^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984646882861 - 2³¹ = 3982499399213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3984646882841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992323441430 + 1992323441431.

It is an arithmetic number, because the mean of its divisors is an integer number (1992323441431).

Almost surely, 2^{3984646882861} is an apocalyptic number.

It is an amenable number.

3984646882861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3984646882861 is an equidigital number, since it uses as much as digits as its factorization.

3984646882861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 764411904, while the sum is 73.

The spelling of 3984646882861 in words is "three trillion, nine hundred eighty-four billion, six hundred forty-six million, eight hundred eighty-two thousand, eight hundred sixty-one".