63867366991 has 2 divisors, whose sum is σ = 63867366992. Its totient is φ = 63867366990.

The previous prime is 63867366949. The next prime is 63867367121. The reversal of 63867366991 is 19966376836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63867366991 - 2¹¹ = 63867364943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63867366491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31933683495 + 31933683496.

It is an arithmetic number, because the mean of its divisors is an integer number (31933683496).

Almost surely, 2^63867366991 is an apocalyptic number.

63867366991 is a deficient number, since it is larger than the sum of its proper divisors (1).

63867366991 is an equidigital number, since it uses as much as digits as its factorization.

63867366991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 64.

The spelling of 63867366991 in words is "sixty-three billion, eight hundred sixty-seven million, three hundred sixty-six thousand, nine hundred ninety-one".