638795532567 has 8 divisors (see below), whose sum is σ = 863723537280. Its totient is φ = 419865608120.

The previous prime is 638795532547. The next prime is 638795532581. The reversal of 638795532567 is 765235597836.

638795532567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 638795532567 - 2¹⁹ = 638795008279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638795532498 and 638795532507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638795532527) 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, 1499519817 + ... + 1499520242.

It is an arithmetic number, because the mean of its divisors is an integer number (107965442160).

Almost surely, 2^638795532567 is an apocalyptic number.

638795532567 is a deficient number, since it is larger than the sum of its proper divisors (224928004713).

638795532567 is a wasteful number, since it uses less digits than its factorization.

638795532567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999040133.

The product of its digits is 285768000, while the sum is 66.

The spelling of 638795532567 in words is "six hundred thirty-eight billion, seven hundred ninety-five million, five hundred thirty-two thousand, five hundred sixty-seven".