6870826972861 has 2 divisors, whose sum is σ = 6870826972862. Its totient is φ = 6870826972860.

The previous prime is 6870826972847. The next prime is 6870826972879. The reversal of 6870826972861 is 1682796280786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421130660025 + 449696312836 = 2533995^2 + 670594^2 .

It is a cyclic number.

It is not a de Polignac number, because 6870826972861 - 2⁷ = 6870826972733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6870826972831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3435413486430 + 3435413486431.

It is an arithmetic number, because the mean of its divisors is an integer number (3435413486431).

Almost surely, 2^{6870826972861} is an apocalyptic number.

It is an amenable number.

6870826972861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6870826972861 is an equidigital number, since it uses as much as digits as its factorization.

6870826972861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 195084288, while the sum is 70.

The spelling of 6870826972861 in words is "six trillion, eight hundred seventy billion, eight hundred twenty-six million, nine hundred seventy-two thousand, eight hundred sixty-one".