2560193805821 has 2 divisors, whose sum is σ = 2560193805822. Its totient is φ = 2560193805820.

The previous prime is 2560193805817. The next prime is 2560193805881. The reversal of 2560193805821 is 1285083910652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2166374803321 + 393819002500 = 1471861^2 + 627550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560193805821 - 2² = 2560193805817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2560193805821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2560193805881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280096902910 + 1280096902911.

It is an arithmetic number, because the mean of its divisors is an integer number (1280096902911).

Almost surely, 2^{2560193805821} is an apocalyptic number.

It is an amenable number.

2560193805821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2560193805821 is an equidigital number, since it uses as much as digits as its factorization.

2560193805821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 2560193805821 in words is "two trillion, five hundred sixty billion, one hundred ninety-three million, eight hundred five thousand, eight hundred twenty-one".