63545561 has 2 divisors, whose sum is σ = 63545562. Its totient is φ = 63545560.

The previous prime is 63545549. The next prime is 63545579. The reversal of 63545561 is 16554536.

63545561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34987225 + 28558336 = 5915^2 + 5344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63545561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63545501) 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 as a sum of consecutive naturals, namely, 31772780 + 31772781.

It is an arithmetic number, because the mean of its divisors is an integer number (31772781).

Almost surely, 2^63545561 is an apocalyptic number.

It is an amenable number.

63545561 is a deficient number, since it is larger than the sum of its proper divisors (1).

63545561 is an equidigital number, since it uses as much as digits as its factorization.

63545561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 35.

The square root of 63545561 is about 7971.5469640466. The cubic root of 63545561 is about 399.0510023726.

Subtracting from 63545561 its reverse (16554536), we obtain a square (46991025 = 6855²).

The spelling of 63545561 in words is "sixty-three million, five hundred forty-five thousand, five hundred sixty-one".