63550621073 has 2 divisors, whose sum is σ = 63550621074. Its totient is φ = 63550621072.

The previous prime is 63550621037. The next prime is 63550621087. The reversal of 63550621073 is 37012605536.

Together with previous prime (63550621037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34024384849 + 29526236224 = 184457^2 + 171832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63550621073 is a prime.

It is not a weakly prime, because it can be changed into another prime (63550621003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31775310536 + 31775310537.

It is an arithmetic number, because the mean of its divisors is an integer number (31775310537).

Almost surely, 2^63550621073 is an apocalyptic number.

It is an amenable number.

63550621073 is a deficient number, since it is larger than the sum of its proper divisors (1).

63550621073 is an equidigital number, since it uses as much as digits as its factorization.

63550621073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 63550621073 in words is "sixty-three billion, five hundred fifty million, six hundred twenty-one thousand, seventy-three".