17145745857 has 6 divisors (see below), whose sum is σ = 24766077362. Its totient is φ = 11430497232.

The previous prime is 17145745829. The next prime is 17145745907. The reversal of 17145745857 is 75854754171.

It is a happy number.

17145745857 is a `hidden beast` number, since 1 + 7 + 1 + 4 + 57 + 4 + 585 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8957486736 + 8188259121 = 94644^2 + 90489^2 .

It is not a de Polignac number, because 17145745857 - 2¹¹ = 17145743809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17145745157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 952541428 + ... + 952541445.

Almost surely, 2^17145745857 is an apocalyptic number.

It is an amenable number.

17145745857 is a deficient number, since it is larger than the sum of its proper divisors (7620331505).

17145745857 is a wasteful number, since it uses less digits than its factorization.

17145745857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905082879 (or 1905082876 counting only the distinct ones).

The product of its digits is 5488000, while the sum is 54.

The spelling of 17145745857 in words is "seventeen billion, one hundred forty-five million, seven hundred forty-five thousand, eight hundred fifty-seven".