63618220609 has 2 divisors, whose sum is σ = 63618220610. Its totient is φ = 63618220608.

The previous prime is 63618220591. The next prime is 63618220651. The reversal of 63618220609 is 90602281636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39709329984 + 23908890625 = 199272^2 + 154625^2 .

It is a cyclic number.

It is not a de Polignac number, because 63618220609 - 2⁵ = 63618220577 is a prime.

It is not a weakly prime, because it can be changed into another prime (63618200609) 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, 31809110304 + 31809110305.

It is an arithmetic number, because the mean of its divisors is an integer number (31809110305).

Almost surely, 2^63618220609 is an apocalyptic number.

It is an amenable number.

63618220609 is a deficient number, since it is larger than the sum of its proper divisors (1).

63618220609 is an equidigital number, since it uses as much as digits as its factorization.

63618220609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 63618220609 in words is "sixty-three billion, six hundred eighteen million, two hundred twenty thousand, six hundred nine".