63947986875 has 30 divisors (see below), whose sum is σ = 115424705396. Its totient is φ = 34105590000.

The previous prime is 63947986873. The next prime is 63947986919. The reversal of 63947986875 is 57868974936.

63947986875 is a `hidden beast` number, since 6 + 3 + 9 + 479 + 86 + 8 + 75 = 666.

It is not a de Polignac number, because 63947986875 - 2¹ = 63947986873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63947986873) 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 in 29 ways as a sum of consecutive naturals, for example, 5678641 + ... + 5689890.

Almost surely, 2^63947986875 is an apocalyptic number.

63947986875 is a deficient number, since it is larger than the sum of its proper divisors (51476718521).

63947986875 is a wasteful number, since it uses less digits than its factorization.

63947986875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11368557 (or 11368539 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 63947986875 in words is "sixty-three billion, nine hundred forty-seven million, nine hundred eighty-six thousand, eight hundred seventy-five".