638869703325 has 48 divisors (see below), whose sum is σ = 1226949077376. Its totient is φ = 287266924800.

The previous prime is 638869703321. The next prime is 638869703371. The reversal of 638869703325 is 523307968836.

It is a happy number.

It is not a de Polignac number, because 638869703325 - 2² = 638869703321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638869703321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9942522 + ... + 10006571.

It is an arithmetic number, because the mean of its divisors is an integer number (25561439112).

Almost surely, 2^638869703325 is an apocalyptic number.

It is an amenable number.

638869703325 is a deficient number, since it is larger than the sum of its proper divisors (588079374051).

638869703325 is a wasteful number, since it uses less digits than its factorization.

638869703325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19949174 (or 19949169 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 60.

The spelling of 638869703325 in words is "six hundred thirty-eight billion, eight hundred sixty-nine million, seven hundred three thousand, three hundred twenty-five".