638588634608 has 20 divisors (see below), whose sum is σ = 1237581310560. Its totient is φ = 319212812544.

The previous prime is 638588634599. The next prime is 638588634659. The reversal of 638588634608 is 806436885836.

638588634608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5029385 + ... + 5154792.

It is an arithmetic number, because the mean of its divisors is an integer number (61879065528).

Almost surely, 2^638588634608 is an apocalyptic number.

It is an amenable number.

638588634608 is a deficient number, since it is larger than the sum of its proper divisors (598992675952).

638588634608 is a wasteful number, since it uses less digits than its factorization.

638588634608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10188104 (or 10188098 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 65.

The spelling of 638588634608 in words is "six hundred thirty-eight billion, five hundred eighty-eight million, six hundred thirty-four thousand, six hundred eight".