638253506325 has 12 divisors (see below), whose sum is σ = 1055245797248. Its totient is φ = 340401870000.

The previous prime is 638253506309. The next prime is 638253506393. The reversal of 638253506325 is 523605352836.

It is not a de Polignac number, because 638253506325 - 2⁴ = 638253506309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4255023301 + ... + 4255023450.

Almost surely, 2^638253506325 is an apocalyptic number.

It is an amenable number.

638253506325 is a deficient number, since it is larger than the sum of its proper divisors (416992290923).

638253506325 is a wasteful number, since it uses less digits than its factorization.

638253506325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510046764 (or 8510046759 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 638253506325 in words is "six hundred thirty-eight billion, two hundred fifty-three million, five hundred six thousand, three hundred twenty-five".