561360565 has 8 divisors (see below), whose sum is σ = 677924280. Its totient is φ = 446227392.

The previous prime is 561360551. The next prime is 561360589. The reversal of 561360565 is 565063165.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 561168721 = 438^2 + 23689^2 .

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 561360565 - 2⁵ = 561360533 is a prime.

It is a congruent 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, 356770 + ... + 358339.

It is an arithmetic number, because the mean of its divisors is an integer number (84740535).

Almost surely, 2^561360565 is an apocalyptic number.

It is an amenable number.

561360565 is a deficient number, since it is larger than the sum of its proper divisors (116563715).

561360565 is a wasteful number, since it uses less digits than its factorization.

561360565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715271.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 561360565 is about 23693.0488751448. The cubic root of 561360565 is about 824.9240530026.

The spelling of 561360565 in words is "five hundred sixty-one million, three hundred sixty thousand, five hundred sixty-five".