561056049 has 24 divisors (see below), whose sum is σ = 881286120. Its totient is φ = 342517248.

The previous prime is 561056009. The next prime is 561056077. The reversal of 561056049 is 940650165.

561056049 is a `hidden beast` number, since 56 + 1 + 0 + 560 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 349877025 + 211179024 = 18705^2 + 14532^2 .

It is not a de Polignac number, because 561056049 - 2¹¹ = 561054001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561056009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43894 + ... + 55215.

It is an arithmetic number, because the mean of its divisors is an integer number (36720255).

Almost surely, 2^561056049 is an apocalyptic number.

It is an amenable number.

561056049 is a deficient number, since it is larger than the sum of its proper divisors (320230071).

561056049 is a wasteful number, since it uses less digits than its factorization.

561056049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99169 (or 99166 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 561056049 is about 23686.6217304199. The cubic root of 561056049 is about 824.7748630852.

The spelling of 561056049 in words is "five hundred sixty-one million, fifty-six thousand, forty-nine".