2821654812689 has 2 divisors, whose sum is σ = 2821654812690. Its totient is φ = 2821654812688.

The previous prime is 2821654812677. The next prime is 2821654812733. The reversal of 2821654812689 is 9862184561282.

2821654812689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2530988264464 + 290666548225 = 1590908^2 + 539135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821654812689 - 2²⁰ = 2821653764113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2821654872689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410827406344 + 1410827406345.

It is an arithmetic number, because the mean of its divisors is an integer number (1410827406345).

Almost surely, 2^{2821654812689} is an apocalyptic number.

It is an amenable number.

2821654812689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821654812689 is an equidigital number, since it uses as much as digits as its factorization.

2821654812689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26542080, while the sum is 62.

The spelling of 2821654812689 in words is "two trillion, eight hundred twenty-one billion, six hundred fifty-four million, eight hundred twelve thousand, six hundred eighty-nine".