638862338413 has 8 divisors (see below), whose sum is σ = 690544365056. Its totient is φ = 587542993200.

The previous prime is 638862338357. The next prime is 638862338431. The reversal of 638862338413 is 314833268836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638862338413 - 2¹³ = 638862330221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638862338483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90666693 + ... + 90673738.

It is an arithmetic number, because the mean of its divisors is an integer number (86318045632).

Almost surely, 2^638862338413 is an apocalyptic number.

It is an amenable number.

638862338413 is a deficient number, since it is larger than the sum of its proper divisors (51682026643).

638862338413 is a wasteful number, since it uses less digits than its factorization.

638862338413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181340715.

The product of its digits is 11943936, while the sum is 55.

The spelling of 638862338413 in words is "six hundred thirty-eight billion, eight hundred sixty-two million, three hundred thirty-eight thousand, four hundred thirteen".