17485278857 has 2 divisors, whose sum is σ = 17485278858. Its totient is φ = 17485278856.

The previous prime is 17485278809. The next prime is 17485278859. The reversal of 17485278857 is 75887258471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14433379321 + 3051899536 = 120139^2 + 55244^2 .

It is a cyclic number.

It is not a de Polignac number, because 17485278857 - 2³⁴ = 305409673 is a prime.

Together with 17485278859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17485278857.

It is not a weakly prime, because it can be changed into another prime (17485278859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8742639428 + 8742639429.

It is an arithmetic number, because the mean of its divisors is an integer number (8742639429).

Almost surely, 2^17485278857 is an apocalyptic number.

It is an amenable number.

17485278857 is a deficient number, since it is larger than the sum of its proper divisors (1).

17485278857 is an equidigital number, since it uses as much as digits as its factorization.

17485278857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35123200, while the sum is 62.

The spelling of 17485278857 in words is "seventeen billion, four hundred eighty-five million, two hundred seventy-eight thousand, eight hundred fifty-seven".