17116561 has 8 divisors (see below), whose sum is σ = 21340224. Its totient is φ = 13337520.

The previous prime is 17116559. The next prime is 17116573. The reversal of 17116561 is 16561171.

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

It is not a de Polignac number, because 17116561 - 2¹ = 17116559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17113561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111070 + ... + 111223.

It is an arithmetic number, because the mean of its divisors is an integer number (2667528).

Almost surely, 2^17116561 is an apocalyptic number.

17116561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17116561 is a deficient number, since it is larger than the sum of its proper divisors (4223663).

17116561 is a wasteful number, since it uses less digits than its factorization.

17116561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222311.

The product of its digits is 1260, while the sum is 28.

The square root of 17116561 is about 4137.2165763953. The cubic root of 17116561 is about 257.7144899641.

The spelling of 17116561 in words is "seventeen million, one hundred sixteen thousand, five hundred sixty-one".