17258720945 has 8 divisors (see below), whose sum is σ = 20723314536. Its totient is φ = 13798410496.

The previous prime is 17258720939. The next prime is 17258720953. The reversal of 17258720945 is 54902785271.

It can be written as a sum of positive squares in 4 ways, for example, as 1701397504 + 15557323441 = 41248^2 + 124729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17258720945 - 2⁶ = 17258720881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17258720893 and 17258720902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061912 + ... + 1078041.

It is an arithmetic number, because the mean of its divisors is an integer number (2590414317).

Almost surely, 2^17258720945 is an apocalyptic number.

It is an amenable number.

17258720945 is a deficient number, since it is larger than the sum of its proper divisors (3464593591).

17258720945 is a wasteful number, since it uses less digits than its factorization.

17258720945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141571.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 17258720945 in words is "seventeen billion, two hundred fifty-eight million, seven hundred twenty thousand, nine hundred forty-five".