720264181697 has 2 divisors, whose sum is σ = 720264181698. Its totient is φ = 720264181696.

The previous prime is 720264181687. The next prime is 720264181837. The reversal of 720264181697 is 796181462027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519957808561 + 200306373136 = 721081^2 + 447556^2 .

It is a cyclic number.

It is not a de Polignac number, because 720264181697 - 2⁶ = 720264181633 is a prime.

It is not a weakly prime, because it can be changed into another prime (720264181627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360132090848 + 360132090849.

It is an arithmetic number, because the mean of its divisors is an integer number (360132090849).

Almost surely, 2^720264181697 is an apocalyptic number.

It is an amenable number.

720264181697 is a deficient number, since it is larger than the sum of its proper divisors (1).

720264181697 is an equidigital number, since it uses as much as digits as its factorization.

720264181697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 720264181697 in words is "seven hundred twenty billion, two hundred sixty-four million, one hundred eighty-one thousand, six hundred ninety-seven".