561445477 has 2 divisors, whose sum is σ = 561445478. Its totient is φ = 561445476.

The previous prime is 561445471. The next prime is 561445487. The reversal of 561445477 is 774544165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306915361 + 254530116 = 17519^2 + 15954^2 .

It is a cyclic number.

It is not a de Polignac number, because 561445477 - 2¹¹ = 561443429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561445471) by changing a digit.

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 as a sum of consecutive naturals, namely, 280722738 + 280722739.

It is an arithmetic number, because the mean of its divisors is an integer number (280722739).

Almost surely, 2^561445477 is an apocalyptic number.

It is an amenable number.

561445477 is a deficient number, since it is larger than the sum of its proper divisors (1).

561445477 is an equidigital number, since it uses as much as digits as its factorization.

561445477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 43.

The square root of 561445477 is about 23694.8407253562. The cubic root of 561445477 is about 824.9656438708.

The spelling of 561445477 in words is "five hundred sixty-one million, four hundred forty-five thousand, four hundred seventy-seven".