638762512632 has 32 divisors (see below), whose sum is σ = 1600185379200. Its totient is φ = 212483624544.

The previous prime is 638762512543. The next prime is 638762512637. The reversal of 638762512632 is 236215267836.

638762512632 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638762512637) 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, 27313882 + ... + 27337257.

It is an arithmetic number, because the mean of its divisors is an integer number (50005793100).

Almost surely, 2^638762512632 is an apocalyptic number.

It is an amenable number.

638762512632 is an abundant number, since it is smaller than the sum of its proper divisors (961422866568).

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

638762512632 is a wasteful number, since it uses less digits than its factorization.

638762512632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54651635 (or 54651631 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The spelling of 638762512632 in words is "six hundred thirty-eight billion, seven hundred sixty-two million, five hundred twelve thousand, six hundred thirty-two".