61044561 has 12 divisors (see below), whose sum is σ = 90559092. Its totient is φ = 39596256.

The previous prime is 61044551. The next prime is 61044661. The reversal of 61044561 is 16544016.

61044561 is a `hidden beast` number, since 61 + 0 + 44 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26010000 + 35034561 = 5100^2 + 5919^2 .

It is not a de Polignac number, because 61044561 - 2⁶ = 61044497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61044551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91326 + ... + 91991.

It is an arithmetic number, because the mean of its divisors is an integer number (7546591).

Almost surely, 2^61044561 is an apocalyptic number.

It is an amenable number.

61044561 is a deficient number, since it is larger than the sum of its proper divisors (29514531).

61044561 is a wasteful number, since it uses less digits than its factorization.

61044561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183360 (or 183357 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 61044561 is about 7813.1018808153. The cubic root of 61044561 is about 393.7455497607.

Adding to 61044561 its reverse (16544016), we get a palindrome (77588577).

The spelling of 61044561 in words is "sixty-one million, forty-four thousand, five hundred sixty-one".