638126325132 has 24 divisors (see below), whose sum is σ = 1529203627056. Its totient is φ = 206959889088.

The previous prime is 638126325107. The next prime is 638126325143. The reversal of 638126325132 is 231523621836.

638126325132 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718610283 + ... + 718611170.

It is an arithmetic number, because the mean of its divisors is an integer number (63716817794).

Almost surely, 2^638126325132 is an apocalyptic number.

It is an amenable number.

638126325132 is an abundant number, since it is smaller than the sum of its proper divisors (891077301924).

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

638126325132 is a wasteful number, since it uses less digits than its factorization.

638126325132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437221497 (or 1437221495 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

Adding to 638126325132 its reverse (231523621836), we get a palindrome (869649946968).

The spelling of 638126325132 in words is "six hundred thirty-eight billion, one hundred twenty-six million, three hundred twenty-five thousand, one hundred thirty-two".