26722248617 has 2 divisors, whose sum is σ = 26722248618. Its totient is φ = 26722248616.

The previous prime is 26722248611. The next prime is 26722248659. The reversal of 26722248617 is 71684222762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17183015056 + 9539233561 = 131084^2 + 97669^2 .

It is a cyclic number.

It is not a de Polignac number, because 26722248617 - 2³⁴ = 9542379433 is a prime.

It is a super-3 number, since 3×26722248617³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (26722248611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13361124308 + 13361124309.

It is an arithmetic number, because the mean of its divisors is an integer number (13361124309).

Almost surely, 2^26722248617 is an apocalyptic number.

It is an amenable number.

26722248617 is a deficient number, since it is larger than the sum of its proper divisors (1).

26722248617 is an equidigital number, since it uses as much as digits as its factorization.

26722248617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 47.

The spelling of 26722248617 in words is "twenty-six billion, seven hundred twenty-two million, two hundred forty-eight thousand, six hundred seventeen".