6745272123217 has 2 divisors, whose sum is σ = 6745272123218. Its totient is φ = 6745272123216.

The previous prime is 6745272123211. The next prime is 6745272123353. The reversal of 6745272123217 is 7123212725476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4985110045696 + 1760162077521 = 2232736^2 + 1326711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6745272123217 is a prime.

It is not a weakly prime, because it can be changed into another prime (6745272123211) 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, 3372636061608 + 3372636061609.

It is an arithmetic number, because the mean of its divisors is an integer number (3372636061609).

Almost surely, 2^{6745272123217} is an apocalyptic number.

It is an amenable number.

6745272123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6745272123217 is an equidigital number, since it uses as much as digits as its factorization.

6745272123217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 49.

The spelling of 6745272123217 in words is "six trillion, seven hundred forty-five billion, two hundred seventy-two million, one hundred twenty-three thousand, two hundred seventeen".