720653862289 has 2 divisors, whose sum is σ = 720653862290. Its totient is φ = 720653862288.

The previous prime is 720653862277. The next prime is 720653862359. The reversal of 720653862289 is 982268356027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592002519889 + 128651342400 = 769417^2 + 358680^2 .

It is a cyclic number.

It is not a de Polignac number, because 720653862289 - 2¹⁵ = 720653829521 is a prime.

It is not a weakly prime, because it can be changed into another prime (720653862259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360326931144 + 360326931145.

It is an arithmetic number, because the mean of its divisors is an integer number (360326931145).

Almost surely, 2^720653862289 is an apocalyptic number.

It is an amenable number.

720653862289 is a deficient number, since it is larger than the sum of its proper divisors (1).

720653862289 is an equidigital number, since it uses as much as digits as its factorization.

720653862289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 720653862289 in words is "seven hundred twenty billion, six hundred fifty-three million, eight hundred sixty-two thousand, two hundred eighty-nine".