2868556861 has 2 divisors, whose sum is σ = 2868556862. Its totient is φ = 2868556860.

The previous prime is 2868556807. The next prime is 2868556879. The reversal of 2868556861 is 1686558682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2394144900 + 474411961 = 48930^2 + 21781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2868556861 - 2¹¹ = 2868554813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2868556661) 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, 1434278430 + 1434278431.

It is an arithmetic number, because the mean of its divisors is an integer number (1434278431).

Almost surely, 2^2868556861 is an apocalyptic number.

It is an amenable number.

2868556861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2868556861 is an equidigital number, since it uses as much as digits as its factorization.

2868556861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 55.

The square root of 2868556861 is about 53558.9101924227. The cubic root of 2868556861 is about 1420.8704675791.

The spelling of 2868556861 in words is "two billion, eight hundred sixty-eight million, five hundred fifty-six thousand, eight hundred sixty-one".