17661849343 has 2 divisors, whose sum is σ = 17661849344. Its totient is φ = 17661849342.

The previous prime is 17661849341. The next prime is 17661849419. The reversal of 17661849343 is 34394816671.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17661849343 - 2¹ = 17661849341 is a prime.

Together with 17661849341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17661849341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8830924671 + 8830924672.

It is an arithmetic number, because the mean of its divisors is an integer number (8830924672).

Almost surely, 2^17661849343 is an apocalyptic number.

17661849343 is a deficient number, since it is larger than the sum of its proper divisors (1).

17661849343 is an equidigital number, since it uses as much as digits as its factorization.

17661849343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 52.

The spelling of 17661849343 in words is "seventeen billion, six hundred sixty-one million, eight hundred forty-nine thousand, three hundred forty-three".