726620521793 has 2 divisors, whose sum is σ = 726620521794. Its totient is φ = 726620521792.

The previous prime is 726620521763. The next prime is 726620521817. The reversal of 726620521793 is 397125026627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677933216689 + 48687305104 = 823367^2 + 220652^2 .

It is a cyclic number.

It is not a de Polignac number, because 726620521793 - 2¹⁴ = 726620505409 is a prime.

It is not a weakly prime, because it can be changed into another prime (726620521703) 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, 363310260896 + 363310260897.

It is an arithmetic number, because the mean of its divisors is an integer number (363310260897).

Almost surely, 2^726620521793 is an apocalyptic number.

It is an amenable number.

726620521793 is a deficient number, since it is larger than the sum of its proper divisors (1).

726620521793 is an equidigital number, since it uses as much as digits as its factorization.

726620521793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 726620521793 in words is "seven hundred twenty-six billion, six hundred twenty million, five hundred twenty-one thousand, seven hundred ninety-three".