561364085 has 4 divisors (see below), whose sum is σ = 673636908. Its totient is φ = 449091264.

The previous prime is 561364081. The next prime is 561364103. The reversal of 561364085 is 580463165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212197489 + 349166596 = 14567^2 + 18686^2 .

It is a cyclic number.

It is not a de Polignac number, because 561364085 - 2² = 561364081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561364081) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 56136404 + ... + 56136413.

It is an arithmetic number, because the mean of its divisors is an integer number (168409227).

Almost surely, 2^561364085 is an apocalyptic number.

It is an amenable number.

561364085 is a deficient number, since it is larger than the sum of its proper divisors (112272823).

561364085 is a wasteful number, since it uses less digits than its factorization.

561364085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112272822.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 561364085 is about 23693.1231584188. The cubic root of 561364085 is about 824.9257772222.

The spelling of 561364085 in words is "five hundred sixty-one million, three hundred sixty-four thousand, eighty-five".