561765065 has 8 divisors (see below), whose sum is σ = 675957120. Its totient is φ = 448186032.

The previous prime is 561765049. The next prime is 561765079. The reversal of 561765065 is 560567165.

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 561765065 - 2⁴ = 561765049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151235 + ... + 154904.

It is an arithmetic number, because the mean of its divisors is an integer number (84494640).

Almost surely, 2^561765065 is an apocalyptic number.

It is an amenable number.

561765065 is a deficient number, since it is larger than the sum of its proper divisors (114192055).

561765065 is a wasteful number, since it uses less digits than its factorization.

561765065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306511.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 561765065 is about 23701.5835968823. The cubic root of 561765065 is about 825.1221441436.

The spelling of 561765065 in words is "five hundred sixty-one million, seven hundred sixty-five thousand, sixty-five".