561617085 has 8 divisors (see below), whose sum is σ = 898587360. Its totient is φ = 299529104.

The previous prime is 561617081. The next prime is 561617101. The reversal of 561617085 is 580716165.

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 561617085 - 2² = 561617081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561617081) 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, 18720555 + ... + 18720584.

It is an arithmetic number, because the mean of its divisors is an integer number (112323420).

Almost surely, 2^561617085 is an apocalyptic number.

It is an amenable number.

561617085 is a deficient number, since it is larger than the sum of its proper divisors (336970275).

561617085 is a wasteful number, since it uses less digits than its factorization.

561617085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37441147.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 561617085 is about 23698.4616589347. The cubic root of 561617085 is about 825.0496866310.

The spelling of 561617085 in words is "five hundred sixty-one million, six hundred seventeen thousand, eighty-five".