63648671 has 2 divisors, whose sum is σ = 63648672. Its totient is φ = 63648670.

The previous prime is 63648661. The next prime is 63648677. The reversal of 63648671 is 17684636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63648671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63648677) 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, 31824335 + 31824336.

It is an arithmetic number, because the mean of its divisors is an integer number (31824336).

Almost surely, 2^63648671 is an apocalyptic number.

63648671 is a deficient number, since it is larger than the sum of its proper divisors (1).

63648671 is an equidigital number, since it uses as much as digits as its factorization.

63648671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 63648671 is about 7978.0117197206. The cubic root of 63648671 is about 399.2667211601.

The spelling of 63648671 in words is "sixty-three million, six hundred forty-eight thousand, six hundred seventy-one".