4509720781273 has 2 divisors, whose sum is σ = 4509720781274. Its totient is φ = 4509720781272.

The previous prime is 4509720781129. The next prime is 4509720781301. The reversal of 4509720781273 is 3721870279054.

4509720781273 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2538021775689 + 1971699005584 = 1593117^2 + 1404172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4509720781273 is a prime.

It is not a weakly prime, because it can be changed into another prime (4509720781873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254860390636 + 2254860390637.

It is an arithmetic number, because the mean of its divisors is an integer number (2254860390637).

Almost surely, 2^{4509720781273} is an apocalyptic number.

It is an amenable number.

4509720781273 is a deficient number, since it is larger than the sum of its proper divisors (1).

4509720781273 is an equidigital number, since it uses as much as digits as its factorization.

4509720781273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 4509720781273 in words is "four trillion, five hundred nine billion, seven hundred twenty million, seven hundred eighty-one thousand, two hundred seventy-three".