722711777416561 has 2 divisors, whose sum is σ = 722711777416562. Its totient is φ = 722711777416560.

The previous prime is 722711777416403. The next prime is 722711777416597. The reversal of 722711777416561 is 165614777117227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540838745283600 + 181873032132961 = 23255940^2 + 13486031^2 .

It is a cyclic number.

It is not a de Polignac number, because 722711777416561 - 2²¹ = 722711775319409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 722711777416493 and 722711777416502.

It is not a weakly prime, because it can be changed into another prime (722711777416361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361355888708280 + 361355888708281.

It is an arithmetic number, because the mean of its divisors is an integer number (361355888708281).

Almost surely, 2^{722711777416561} is an apocalyptic number.

It is an amenable number.

722711777416561 is a deficient number, since it is larger than the sum of its proper divisors (1).

722711777416561 is an equidigital number, since it uses as much as digits as its factorization.

722711777416561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48404160, while the sum is 64.

The spelling of 722711777416561 in words is "seven hundred twenty-two trillion, seven hundred eleven billion, seven hundred seventy-seven million, four hundred sixteen thousand, five hundred sixty-one".