63018634661 has 2 divisors, whose sum is σ = 63018634662. Its totient is φ = 63018634660.

The previous prime is 63018634571. The next prime is 63018634669. The reversal of 63018634661 is 16643681036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62988450625 + 30184036 = 250975^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 63018634661 - 2¹⁰ = 63018633637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63018634669) 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, 31509317330 + 31509317331.

It is an arithmetic number, because the mean of its divisors is an integer number (31509317331).

Almost surely, 2^63018634661 is an apocalyptic number.

It is an amenable number.

63018634661 is a deficient number, since it is larger than the sum of its proper divisors (1).

63018634661 is an equidigital number, since it uses as much as digits as its factorization.

63018634661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 63018634661 in words is "sixty-three billion, eighteen million, six hundred thirty-four thousand, six hundred sixty-one".