561315745 has 8 divisors (see below), whose sum is σ = 674039016. Its totient is φ = 448745856.

The previous prime is 561315737. The next prime is 561315757. The reversal of 561315745 is 547513165.

It can be written as a sum of positive squares in 4 ways, for example, as 121616784 + 439698961 = 11028^2 + 20969^2 .

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 561315745 - 2³ = 561315737 is a prime.

It is a Duffinian 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, 30132 + ... + 45061.

It is an arithmetic number, because the mean of its divisors is an integer number (84254877).

Almost surely, 2^561315745 is an apocalyptic number.

It is an amenable number.

561315745 is a deficient number, since it is larger than the sum of its proper divisors (112723271).

561315745 is a wasteful number, since it uses less digits than its factorization.

561315745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76691.

The product of its digits is 63000, while the sum is 37.

The square root of 561315745 is about 23692.1030092307. The cubic root of 561315745 is about 824.9020979632.

The spelling of 561315745 in words is "five hundred sixty-one million, three hundred fifteen thousand, seven hundred forty-five".