63936489667 has 2 divisors, whose sum is σ = 63936489668. Its totient is φ = 63936489666.

The previous prime is 63936489613. The next prime is 63936489697. The reversal of 63936489667 is 76698463936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63936489667 is a prime.

It is not a weakly prime, because it can be changed into another prime (63936489607) 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, 31968244833 + 31968244834.

It is an arithmetic number, because the mean of its divisors is an integer number (31968244834).

Almost surely, 2^63936489667 is an apocalyptic number.

63936489667 is a deficient number, since it is larger than the sum of its proper divisors (1).

63936489667 is an equidigital number, since it uses as much as digits as its factorization.

63936489667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 67.

The spelling of 63936489667 in words is "sixty-three billion, nine hundred thirty-six million, four hundred eighty-nine thousand, six hundred sixty-seven".