2028633320561 has 2 divisors, whose sum is σ = 2028633320562. Its totient is φ = 2028633320560.

The previous prime is 2028633320531. The next prime is 2028633320603. The reversal of 2028633320561 is 1650233368202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1723559368336 + 305073952225 = 1312844^2 + 552335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2028633320561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2028633320531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014316660280 + 1014316660281.

It is an arithmetic number, because the mean of its divisors is an integer number (1014316660281).

Almost surely, 2^{2028633320561} is an apocalyptic number.

It is an amenable number.

2028633320561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028633320561 is an equidigital number, since it uses as much as digits as its factorization.

2028633320561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 2028633320561 its reverse (1650233368202), we get a palindrome (3678866688763).

The spelling of 2028633320561 in words is "two trillion, twenty-eight billion, six hundred thirty-three million, three hundred twenty thousand, five hundred sixty-one".