638200125132 has 12 divisors (see below), whose sum is σ = 1489133625336. Its totient is φ = 212733375040.

The previous prime is 638200125131. The next prime is 638200125253. The reversal of 638200125132 is 231521002836.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 638200125093 and 638200125102.

It is not an unprimeable number, because it can be changed into a prime (638200125131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26591671869 + ... + 26591671892.

It is an arithmetic number, because the mean of its divisors is an integer number (124094468778).

Almost surely, 2^638200125132 is an apocalyptic number.

It is an amenable number.

638200125132 is an abundant number, since it is smaller than the sum of its proper divisors (850933500204).

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

638200125132 is a wasteful number, since it uses less digits than its factorization.

638200125132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53183343768 (or 53183343766 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 638200125132 its reverse (231521002836), we get a palindrome (869721127968).

The spelling of 638200125132 in words is "six hundred thirty-eight billion, two hundred million, one hundred twenty-five thousand, one hundred thirty-two".