17749229549 has 2 divisors, whose sum is σ = 17749229550. Its totient is φ = 17749229548.

The previous prime is 17749229503. The next prime is 17749229567. The reversal of 17749229549 is 94592294771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17739576100 + 9653449 = 133190^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17749229549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17749229249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8874614774 + 8874614775.

It is an arithmetic number, because the mean of its divisors is an integer number (8874614775).

Almost surely, 2^17749229549 is an apocalyptic number.

It is an amenable number.

17749229549 is a deficient number, since it is larger than the sum of its proper divisors (1).

17749229549 is an equidigital number, since it uses as much as digits as its factorization.

17749229549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 59.

The spelling of 17749229549 in words is "seventeen billion, seven hundred forty-nine million, two hundred twenty-nine thousand, five hundred forty-nine".