63968528671 has 8 divisors (see below), whose sum is σ = 66770328960. Its totient is φ = 61168441752.

The previous prime is 63968528651. The next prime is 63968528677. The reversal of 63968528671 is 17682586936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63968528671 - 2⁹ = 63968528159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63968528677) 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 in 7 ways as a sum of consecutive naturals, for example, 351745 + ... + 501658.

It is an arithmetic number, because the mean of its divisors is an integer number (8346291120).

Almost surely, 2^63968528671 is an apocalyptic number.

63968528671 is a deficient number, since it is larger than the sum of its proper divisors (2801800289).

63968528671 is a wasteful number, since it uses less digits than its factorization.

63968528671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856685.

The product of its digits is 26127360, while the sum is 61.

The spelling of 63968528671 in words is "sixty-three billion, nine hundred sixty-eight million, five hundred twenty-eight thousand, six hundred seventy-one".