638338200853 has 16 divisors (see below), whose sum is σ = 642311392320. Its totient is φ = 634378752000.

The previous prime is 638338200817. The next prime is 638338200917. The reversal of 638338200853 is 358002833836.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638338200853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638338200797 and 638338200806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638338270853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299547598 + ... + 299549728.

It is an arithmetic number, because the mean of its divisors is an integer number (40144462020).

Almost surely, 2^638338200853 is an apocalyptic number.

It is an amenable number.

638338200853 is a deficient number, since it is larger than the sum of its proper divisors (3973191467).

638338200853 is a wasteful number, since it uses less digits than its factorization.

638338200853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 638338200853 in words is "six hundred thirty-eight billion, three hundred thirty-eight million, two hundred thousand, eight hundred fifty-three".