2072664220789 has 2 divisors, whose sum is σ = 2072664220790. Its totient is φ = 2072664220788.

The previous prime is 2072664220751. The next prime is 2072664220813. The reversal of 2072664220789 is 9870224662702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1842580911889 + 230083308900 = 1357417^2 + 479670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2072664220789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2072664220729) 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, 1036332110394 + 1036332110395.

It is an arithmetic number, because the mean of its divisors is an integer number (1036332110395).

Almost surely, 2^{2072664220789} is an apocalyptic number.

It is an amenable number.

2072664220789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2072664220789 is an equidigital number, since it uses as much as digits as its factorization.

2072664220789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 2072664220789 in words is "two trillion, seventy-two billion, six hundred sixty-four million, two hundred twenty thousand, seven hundred eighty-nine".