561160561 has 8 divisors (see below), whose sum is σ = 605228904. Its totient is φ = 517221120.

The previous prime is 561160559. The next prime is 561160597. The reversal of 561160561 is 165061165.

It can be written as a sum of positive squares in 4 ways, for example, as 224070961 + 337089600 = 14969^2 + 18360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561160561 - 2¹ = 561160559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561160511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23080 + ... + 40681.

It is an arithmetic number, because the mean of its divisors is an integer number (75653613).

Almost surely, 2^561160561 is an apocalyptic number.

It is an amenable number.

561160561 is a deficient number, since it is larger than the sum of its proper divisors (44068343).

561160561 is a wasteful number, since it uses less digits than its factorization.

561160561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64451.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 561160561 is about 23688.8277675363. The cubic root of 561160561 is about 824.8260721809.

The spelling of 561160561 in words is "five hundred sixty-one million, one hundred sixty thousand, five hundred sixty-one".