17554870549 has 2 divisors, whose sum is σ = 17554870550. Its totient is φ = 17554870548.

The previous prime is 17554870537. The next prime is 17554870573. The reversal of 17554870549 is 94507845571.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15679547524 + 1875323025 = 125218^2 + 43305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17554870549 is a prime.

It is a super-2 number, since 2×17554870549² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17554870549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17554870579) 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, 8777435274 + 8777435275.

It is an arithmetic number, because the mean of its divisors is an integer number (8777435275).

Almost surely, 2^17554870549 is an apocalyptic number.

It is an amenable number.

17554870549 is a deficient number, since it is larger than the sum of its proper divisors (1).

17554870549 is an equidigital number, since it uses as much as digits as its factorization.

17554870549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 17554870549 in words is "seventeen billion, five hundred fifty-four million, eight hundred seventy thousand, five hundred forty-nine".