17745128073 has 6 divisors (see below), whose sum is σ = 25631851674. Its totient is φ = 11830085376.

The previous prime is 17745128059. The next prime is 17745128077. The reversal of 17745128073 is 37082154771.

17745128073 is a `hidden beast` number, since 177 + 451 + 28 + 0 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8981921529 + 8763206544 = 94773^2 + 93612^2 .

It is not a de Polignac number, because 17745128073 - 2⁴ = 17745128057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17745128077) 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 in 5 ways as a sum of consecutive naturals, for example, 985840440 + ... + 985840457.

It is an arithmetic number, because the mean of its divisors is an integer number (4271975279).

Almost surely, 2^17745128073 is an apocalyptic number.

It is an amenable number.

17745128073 is a deficient number, since it is larger than the sum of its proper divisors (7886723601).

17745128073 is a wasteful number, since it uses less digits than its factorization.

17745128073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971680903 (or 1971680900 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 17745128073 in words is "seventeen billion, seven hundred forty-five million, one hundred twenty-eight thousand, seventy-three".