63943399028 has 12 divisors (see below), whose sum is σ = 111904450560. Its totient is φ = 31970698872.

The previous prime is 63943398971. The next prime is 63943399033. The reversal of 63943399028 is 82099334936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95798 + ... + 370221.

It is an arithmetic number, because the mean of its divisors is an integer number (9325370880).

Almost surely, 2^63943399028 is an apocalyptic number.

It is an amenable number.

63943399028 is a deficient number, since it is larger than the sum of its proper divisors (47961051532).

63943399028 is a wasteful number, since it uses less digits than its factorization.

63943399028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500326 (or 500324 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 56.

The spelling of 63943399028 in words is "sixty-three billion, nine hundred forty-three million, three hundred ninety-nine thousand, twenty-eight".