638374583325 has 24 divisors (see below), whose sum is σ = 1055492755648. Its totient is φ = 340451354880.

The previous prime is 638374583317. The next prime is 638374583347. The reversal of 638374583325 is 523385473836.

It is a happy number.

It is not a de Polignac number, because 638374583325 - 2³ = 638374583317 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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1631157 + ... + 1984293.

Almost surely, 2^638374583325 is an apocalyptic number.

It is an amenable number.

638374583325 is a deficient number, since it is larger than the sum of its proper divisors (417118172323).

638374583325 is a wasteful number, since it uses less digits than its factorization.

638374583325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377253 (or 377248 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 57.

The spelling of 638374583325 in words is "six hundred thirty-eight billion, three hundred seventy-four million, five hundred eighty-three thousand, three hundred twenty-five".