17109723457 has 4 divisors (see below), whose sum is σ = 18116177796. Its totient is φ = 16103269120.

The previous prime is 17109723451. The next prime is 17109723461. The reversal of 17109723457 is 75432790171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75432790171 = 67129 ⋅1123699.

It can be written as a sum of positive squares in 2 ways, for example, as 5035889296 + 12073834161 = 70964^2 + 109881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17109723457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17109723451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503227144 + ... + 503227177.

It is an arithmetic number, because the mean of its divisors is an integer number (4529044449).

Almost surely, 2^17109723457 is an apocalyptic number.

17109723457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

17109723457 is a deficient number, since it is larger than the sum of its proper divisors (1006454339).

17109723457 is a wasteful number, since it uses less digits than its factorization.

17109723457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006454338.

The product of its (nonzero) digits is 370440, while the sum is 46.

The spelling of 17109723457 in words is "seventeen billion, one hundred nine million, seven hundred twenty-three thousand, four hundred fifty-seven".