2090786628221 has 2 divisors, whose sum is σ = 2090786628222. Its totient is φ = 2090786628220.

The previous prime is 2090786628199. The next prime is 2090786628263. The reversal of 2090786628221 is 1228266870902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1643741947225 + 447044680996 = 1282085^2 + 668614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2090786628221 - 2³⁰ = 2089712886397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2090786621221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045393314110 + 1045393314111.

It is an arithmetic number, because the mean of its divisors is an integer number (1045393314111).

Almost surely, 2^{2090786628221} is an apocalyptic number.

It is an amenable number.

2090786628221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2090786628221 is an equidigital number, since it uses as much as digits as its factorization.

2090786628221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 2090786628221 in words is "two trillion, ninety billion, seven hundred eighty-six million, six hundred twenty-eight thousand, two hundred twenty-one".