638560063398 has 48 divisors (see below), whose sum is σ = 1311750475776. Its totient is φ = 207213461040.

The previous prime is 638560063343. The next prime is 638560063409. The reversal of 638560063398 is 893360065836.

638560063398 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 23 ways as a sum of consecutive naturals, for example, 2002843 + ... + 2299673.

It is an arithmetic number, because the mean of its divisors is an integer number (27328134912).

Almost surely, 2^638560063398 is an apocalyptic number.

638560063398 is an abundant number, since it is smaller than the sum of its proper divisors (673190412378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638560063398 is a wasteful number, since it uses less digits than its factorization.

638560063398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297057 (or 296998 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 638560063398 in words is "six hundred thirty-eight billion, five hundred sixty million, sixty-three thousand, three hundred ninety-eight".