17661849119 has 2 divisors, whose sum is σ = 17661849120. Its totient is φ = 17661849118.

The previous prime is 17661849103. The next prime is 17661849167. The reversal of 17661849119 is 91194816671.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17661849119 - 2⁴ = 17661849103 is a prime.

It is a super-2 number, since 2×17661849119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17661849199) 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, 8830924559 + 8830924560.

It is an arithmetic number, because the mean of its divisors is an integer number (8830924560).

Almost surely, 2^17661849119 is an apocalyptic number.

17661849119 is a deficient number, since it is larger than the sum of its proper divisors (1).

17661849119 is an equidigital number, since it uses as much as digits as its factorization.

17661849119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 53.

The spelling of 17661849119 in words is "seventeen billion, six hundred sixty-one million, eight hundred forty-nine thousand, one hundred nineteen".