17667320849 has 2 divisors, whose sum is σ = 17667320850. Its totient is φ = 17667320848.

The previous prime is 17667320819. The next prime is 17667320857. The reversal of 17667320849 is 94802376671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17371240000 + 296080849 = 131800^2 + 17207^2 .

It is a cyclic number.

It is not a de Polignac number, because 17667320849 - 2¹⁶ = 17667255313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17667320849.

It is not a weakly prime, because it can be changed into another prime (17667320819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8833660424 + 8833660425.

It is an arithmetic number, because the mean of its divisors is an integer number (8833660425).

Almost surely, 2^17667320849 is an apocalyptic number.

It is an amenable number.

17667320849 is a deficient number, since it is larger than the sum of its proper divisors (1).

17667320849 is an equidigital number, since it uses as much as digits as its factorization.

17667320849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 17667320849 in words is "seventeen billion, six hundred sixty-seven million, three hundred twenty thousand, eight hundred forty-nine".