63998208388 has 24 divisors (see below), whose sum is σ = 115968041280. Its totient is φ = 30866562720.

The previous prime is 63998208353. The next prime is 63998208389. The reversal of 63998208388 is 88380289936.

63998208388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63998208389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136198 + ... + 382813.

It is an arithmetic number, because the mean of its divisors is an integer number (4832001720).

Almost surely, 2^63998208388 is an apocalyptic number.

It is an amenable number.

63998208388 is a deficient number, since it is larger than the sum of its proper divisors (51969832892).

63998208388 is a wasteful number, since it uses less digits than its factorization.

63998208388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520107 (or 520105 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 64.

The spelling of 63998208388 in words is "sixty-three billion, nine hundred ninety-eight million, two hundred eight thousand, three hundred eighty-eight".