63633326989 has 2 divisors, whose sum is σ = 63633326990. Its totient is φ = 63633326988.

The previous prime is 63633326971. The next prime is 63633327061. The reversal of 63633326989 is 98962333636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42628622089 + 21004704900 = 206467^2 + 144930^2 .

It is a cyclic number.

It is not a de Polignac number, because 63633326989 - 2⁵ = 63633326957 is a prime.

It is a super-2 number, since 2×63633326989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63633326969) 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, 31816663494 + 31816663495.

It is an arithmetic number, because the mean of its divisors is an integer number (31816663495).

Almost surely, 2^63633326989 is an apocalyptic number.

It is an amenable number.

63633326989 is a deficient number, since it is larger than the sum of its proper divisors (1).

63633326989 is an equidigital number, since it uses as much as digits as its factorization.

63633326989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22674816, while the sum is 58.

The spelling of 63633326989 in words is "sixty-three billion, six hundred thirty-three million, three hundred twenty-six thousand, nine hundred eighty-nine".