63326561 has 2 divisors, whose sum is σ = 63326562. Its totient is φ = 63326560.

The previous prime is 63326537. The next prime is 63326569. The reversal of 63326561 is 16562336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33131536 + 30195025 = 5756^2 + 5495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63326561 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_3747461 and since 63326561 and 3747461 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63326569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31663280 + 31663281.

It is an arithmetic number, because the mean of its divisors is an integer number (31663281).

Almost surely, 2^63326561 is an apocalyptic number.

It is an amenable number.

63326561 is a deficient number, since it is larger than the sum of its proper divisors (1).

63326561 is an equidigital number, since it uses as much as digits as its factorization.

63326561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 32.

The square root of 63326561 is about 7957.7987534242. The cubic root of 63326561 is about 398.5920521047.

Adding to 63326561 its reverse (16562336), we get a palindrome (79888897).

The spelling of 63326561 in words is "sixty-three million, three hundred twenty-six thousand, five hundred sixty-one".