722848256385617 has 2 divisors, whose sum is σ = 722848256385618. Its totient is φ = 722848256385616.

The previous prime is 722848256385569. The next prime is 722848256385637. The reversal of 722848256385617 is 716583652848227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503225311443856 + 219622944941761 = 22432684^2 + 14819681^2 .

It is a cyclic number.

It is not a de Polignac number, because 722848256385617 - 2¹⁶ = 722848256320081 is a prime.

It is not a weakly prime, because it can be changed into another prime (722848256385637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361424128192808 + 361424128192809.

It is an arithmetic number, because the mean of its divisors is an integer number (361424128192809).

Almost surely, 2^{722848256385617} is an apocalyptic number.

It is an amenable number.

722848256385617 is a deficient number, since it is larger than the sum of its proper divisors (1).

722848256385617 is an equidigital number, since it uses as much as digits as its factorization.

722848256385617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2167603200, while the sum is 74.

The spelling of 722848256385617 in words is "seven hundred twenty-two trillion, eight hundred forty-eight billion, two hundred fifty-six million, three hundred eighty-five thousand, six hundred seventeen".